Pneumonia, Pneumococcal

The CDC’s Advisory Committee on Immunization Practices on Wednesday backed the use of Merck’s Capvaxive and Pfizer’s Prevnar 20 in adults between 50-64 years of age, opening a bigger market for the respective companies. An expert panel of the U.S. Centers for Disease Control and Prevention on Wednesday supported the broader use of pneumococcal vaccines, including adults between 19 and 49 years with certain risk factors, according to Reuters . The CDC’s Advisory Committee on Immunization Practices (ACIP) voted 14–1 in favor of expanding the agency’s guidance for pneumococcal vaccines—such as Merck ’s Capvaxive and Pfizer ’s Prevnar 20—to cover adults aged 50 to 64 years. These recommendations are not yet final and will still need final approval from the CDC director and the Department of Health and Human Services. Still, the new guidelines could unlock a bigger patient pool for Merck and Pfizer. Currently, the CDC only recommends pneumococcal vaccination for older adults 65 years and above , as well as in young adults aged 19 through 65 with certain risk conditions. A Merck spokesperson in an emailed statement welcomed the results of the ACIP vote, calling it a “potentially practice-changing decision” that could contribute to better immunization rates and health outcomes. The ACIP’s recommendations, if approved by the CDC director, “can help advance how we protect our communities from invasive pneumococcal disease and pneumococcal pneumonia,” the spokesperson said. Merck’s Capvaxive, which the FDA approved in June 2024 , is a 21-valent vaccine that targets the most prevalent serotypes, which cause around 84% of invasive pneumococcal disease in adults 50 years and older. A few weeks after approval, the CDC’s ACIP unanimously endorsed the use of Capvaxive. According to a Merck press release following the ACIP vote, the panel specifically recommends Capvaxive for adults aged 50 years and above who have not yet been immunized with a pneumococcal conjugate vaccine. The shot can also be given to vaccine-naïve younger adults 19 to 49 years with “certain underlying medical conditions” and other risk factors. The ACIP vote on Wednesday also presents a potential boon to Pfizer, which markets the 20-valent Prevnar 20. The FDA first approved the vaccine in June 2021 for adults 18 and above, and then in April 2023 to allow for pediatric use. Prevnar 20 improves upon Pfizer’s previous pneumococcal vaccine—Prevnar 13, which only covered 13 virus serotypes—and targets additional serotypes known to cause invasive pneumococcal disease or are associated with high fatality rates and antibiotic resistance. As in the case of Capvaxive, the ACIP on Wednesday backed the use of Prevnar 20 in older adults 50 years and older, and in 19-to-49-year-olds with certain risk factors, according to a Pfizer press release .

October 23, 2024 7:58 pm ET Age-based recommendations for adult pneumococcal vaccination lowered from 65 to 50 years of age and older National-level CDC surveillance data shows CAPVAXIVE covers the serotypes responsible for approximately 84% of invasive pneumococcal disease cases, compared to approximately 52% covered by PCV20 RAHWAY, N.J.--(BUSINESS WIRE)-- Merck (NYSE: MRK), known as MSD outside of the United States and Canada, announced today that the U.S. Centers for Disease Control and Prevention’s (CDC’s) Advisory Committee on Immunization Practices (ACIP) voted to update the adult age-based pneumococcal vaccination guidelines and recommends CAPVAXIVE™ (Pneumococcal 21-valent Conjugate Vaccine) for pneumococcal vaccination in adults 50 years of age and older. The updated ACIP guidelines recommend a single dose of CAPVAXIVE for: Adults 50 years of age and older who have not previously received a pneumococcal conjugate vaccine or whose previous vaccination history is unknown; Adults 19-49 years of age with certain underlying medical conditions or other risk factors who have not previously received a pneumococcal conjugate vaccine or whose previous vaccination history is unknown; Adults 19 years of age and older who have started their pneumococcal vaccine series with PCV13 (pneumococcal 13-valent conjugate vaccine) but have not received all recommended PPSV23 (pneumococcal 23-valent polysaccharide vaccine) doses. Shared clinical decision-making is also recommended regarding use of a supplemental dose of CAPVAXIVE for adults 65 years of age and older who have completed their vaccine series with both PCV13 and PPSV23. CAPVAXIVE is indicated for: Active immunization for the prevention of invasive disease and pneumonia caused by Streptococcus pneumoniae serotypes 3, 6A, 7F, 8, 9N, 10A, 11A, 12F, 15A, 15B, 15C, 16F, 17F, 19A, 20A, 22F, 23A, 23B, 24F, 31, 33F and 35B in adults individuals 18 years of age and older; Active immunization for the prevention of pneumonia caused by S. pneumoniae serotypes 3, 6A, 7F, 8, 9N, 10A, 11A, 12F, 15A, 15C, 16F, 17F, 19A, 20A, 22F, 23A, 23B, 24F, 31, 33F and 35B in individuals 18 years of age and older. CAPVAXIVE should not be administered to individuals with a history of a severe allergic reaction (e.g., anaphylaxis) to any component of CAPVAXIVE or to diphtheria toxoid; see additional Select Safety Information below. The indication for the prevention of pneumonia caused by S. pneumoniae serotypes 3, 6A, 7F, 8, 9N, 10A, 11A, 12F, 15A, 15C, 16F, 17F, 19A, 20A, 22F, 23A, 23B, 24F, 31, 33F and 35B is approved under accelerated approval based on immune responses as measured by opsonophagocytic activity (OPA). Continued approval for this indication may be contingent upon verification and description of clinical benefit in a confirmatory trial. “The CDC’s decision to lower the age-based vaccination recommendations to begin at age 50 has the potential to be a practice-changing milestone,” said Dr. Eliav Barr, senior vice president, head of global clinical development and chief medical officer, Merck Research Laboratories. “This recommendation is a significant step forward in efforts to enhance equitable access and may improve vaccination rates. We’re pleased about this progress and thank the CDC for their commitment to addressing invasive pneumococcal disease and pneumococcal pneumonia in adults.” Based on national-level CDC data from 2018-2022, the serotypes covered by CAPVAXIVE are responsible for more cases of invasive pneumococcal disease (IPD) in adults compared to PCV20 (pneumococcal 20-valent conjugate vaccine). In adults 50 years of age and older, CAPVAXIVE covers the serotypes responsible for approximately 84% of IPD cases, compared to approximately 52% covered by PCV20. These values are based on CDC epidemiologic data and do not reflect the efficacy of the respective vaccines. There are currently no studies comparing the efficacy of CAPVAXIVE and PCV20. In certain at-risk adult populations in Alaska, Colorado, New Mexico, Oregon and the Navajo Nation, a higher prevalence of IPD caused by serotype 4, which is not included in CAPVAXIVE, has been reported. IPD surveillance from other geographic areas in the U.S. has not detected significant percentages of serotype 4. These provisional recommendations will be published on the CDC website following the meeting and will be official once reviewed and finalized by the director of the CDC and the Department of Health and Human Services. Select Safety Information for CAPVAXIVE Do not administer CAPVAXIVE to individuals with a history of a severe allergic reaction (eg, anaphylaxis) to any component of CAPVAXIVE or to diphtheria toxoid. Individuals with altered immunocompetence, including those receiving immunosuppressive therapy, may have a reduced immune response to CAPVAXIVE. The most commonly reported (>10%) solicited adverse reactions in individuals 18 through 49 years of age who received CAPVAXIVE were: injection-site pain (73.1%), fatigue (36.0%), headache (27.5%), myalgia (16.4%), injection-site erythema (13.8%), and injection-site swelling (13.3%). The most commonly reported (>10%) solicited adverse reactions in individuals 50 years of age and older who received CAPVAXIVE were: injection-site pain (41.2%), fatigue (19.7%), and headache (11.0%). Vaccination with CAPVAXIVE may not protect all vaccine recipients. About CAPVAXIVE CAPVAXIVE is Merck’s approved 21-valent pneumococcal conjugate vaccine indicated for active immunization for the prevention of invasive disease and pneumonia in adults 18 years of age and older. CAPVAXIVE is specifically designed to help address Streptococcus pneumoniae serotypes predominantly responsible for adult invasive pneumococcal disease (IPD), including eight unique serotypes, 15A, 15C, 16F, 23A, 23B, 24F, 31 and 35B compared to other pneumococcal vaccines. CAPVAXIVE is administered as a single dose. About Pneumococcal Disease Pneumococcal disease is an infection caused by a bacteria called Streptococcus pneumoniae . There are about 100 different types (referred to as serotypes) of pneumococcal bacteria, which can affect adults differently than children. Pneumococcal disease can be invasive or non-invasive. Non-invasive pneumococcal illnesses include pneumonia (when pneumococcal disease is confined to the lungs), whereas invasive pneumococcal illnesses include pneumococcal bacteremia (infection in the bloodstream), bacteremic pneumococcal pneumonia (pneumonia with bacteremia) and pneumococcal meningitis (infection of the coverings of the brain and spinal cord). Pneumococcal pneumonia is a type of bacterial pneumonia, which is the most common clinical presentation of pneumococcal disease in adults. It’s estimated that over 150,000 adults are hospitalized from pneumococcal pneumonia each year in the U.S. About Merck At Merck, known as MSD outside of the United States and Canada, we are unified around our purpose: We use the power of leading-edge science to save and improve lives around the world. For more than 130 years, we have brought hope to humanity through the development of important medicines and vaccines. We aspire to be the premier research-intensive biopharmaceutical company in the world – and today, we are at the forefront of research to deliver innovative health solutions that advance the prevention and treatment of diseases in people and animals. We foster a diverse and inclusive global workforce and operate responsibly every day to enable a safe, sustainable and healthy future for all people and communities. For more information, visit www.merck.com and connect with us on X (formerly Twitter) , Facebook , Instagram , YouTube and LinkedIn . Forward-Looking Statement of Merck & Co., Inc., Rahway, N.J., USA This news release of Merck & Co., Inc., Rahway, N.J., USA (the “company”) includes “forward-looking statements” within the meaning of the safe harbor provisions of the U.S. Private Securities Litigation Reform Act of 1995. These statements are based upon the current beliefs and expectations of the company’s management and are subject to significant risks and uncertainties. There can be no guarantees with respect to pipeline candidates that the candidates will receive the necessary regulatory approvals or that they will prove to be commercially successful. If underlying assumptions prove inaccurate or risks or uncertainties materialize, actual results may differ materially from those set forth in the forward-looking statements. Risks and uncertainties include but are not limited to, general industry conditions and competition; general economic factors, including interest rate and currency exchange rate fluctuations; the impact of pharmaceutical industry regulation and health care legislation in the United States and internationally; global trends toward health care cost containment; technological advances, new products and patents attained by competitors; challenges inherent in new product development, including obtaining regulatory approval; the company’s ability to accurately predict future market conditions; manufacturing difficulties or delays; financial instability of international economies and sovereign risk; dependence on the effectiveness of the company’s patents and other protections for innovative products; and the exposure to litigation, including patent litigation, and/or regulatory actions. The company undertakes no obligation to publicly update any forward-looking statement, whether as a result of new information, future events or otherwise. Additional factors that could cause results to differ materially from those described in the forward-looking statements can be found in the company’s Annual Report on Form 10-K for the year ended December 31, 2023 and the company’s other filings with the Securities and Exchange Commission (SEC) available at the SEC’s Internet site ( www.sec.gov ). Please see Prescribing Information for CAPVAXIVE (Pneumococcal 21-valent Conjugate Vaccine) at https://www.merck.com/product/usa/pi_circulars/c/capvaxive/capvaxive_pi.pdf and Patient Information/Medication Guide for CAPVAXIVE at https://www.merck.com/product/usa/pi_circulars/c/capvaxive/capvaxive_ppi.pdf . Media Contacts: Julie Cunningham (617) 519-6264 julie.cunningham@merck.com Chrissy Trank (640) 650-0694 chrissy.trank@merck.com Investor Contacts: Peter Dannenbaum (732) 594-1579 peter.dannenbaum@merck.com Alexis Constantine (732) 594-1578 alexis.constantine@merck.com Source: Merck & Co., Inc.

Millions of newly eligible U.S. adults aged 50 to 64 now recommended to receive vaccination against invasive pneumococcal disease (IPD) and pneumococcal pneumonia 1 NEW YORK--(BUSINESS WIRE)-- Pfizer Inc. (NYSE: PFE) announced today that the U.S. Centers for Disease Control and Prevention’s (CDC) Advisory Committee on Immunization Practice (ACIP) voted to expand its recommendation for the use of certain pneumococcal vaccines, including PREVNAR 20 ® (20-valent Pneumococcal Conjugate Vaccine) for all adults aged 50 and older. This recommendation is pending final approval by the director of the CDC and the Department of Health and Human Services. With respect to PREVNAR 20, ACIP recommended: Vaccination is recommended for all adults aged ≥50 years and for adults aged 19–49 years with certain underlying conditions or risk factors who have not received a PCV or whose vaccination history is unknown. “ACIP’s vote to expand adult pneumococcal vaccination to now include all adults aged 50 and older marks an important milestone in Pfizer’s long-standing commitment to reducing the burden of this life-threatening disease,” said Luis Jodar, PhD, Senior Vice President, Vaccines and Anti-Infectives Chief Medical Affairs Officers, Pfizer. “PREVNAR 20 offers protection against the serotypes responsible for the majority of invasive pneumococcal disease cases in this age group. Expanding its use also provides an opportunity to limit the re-emergence of disease-causing strains like serotype 4, which has recently affected certain U.S. adult populations and is covered by the vaccine.” In the U.S., the 20 serotypes contained in PREVNAR 20 are estimated to cause over 2,000 deaths and more than 65,000 cases of invasive pneumococcal disease (IPD), including bacteremia and meningitis, and community-acquired pneumonia annually in adults aged 50 to 64. 2 Between 2018 and 2022, more than half of IPD cases in people aged 50 to 64 were caused by these 20 serotypes. 3 Vaccination with PREVNAR 20 helps prevent serotype 4 disease, which incidence has been rising in certain populations in the western U.S. 4 About PREVNAR 20 ® PREVNAR 20 ® is Pfizer’s next-generation pneumococcal conjugate vaccine that includes capsular polysaccharide conjugates for the 13 serotypes (1, 3, 4, 5, 6A, 6B, 7F, 9V, 14, 18C, 19A, 19F, and 23F) already included in Prevnar 13 ® (Pneumococcal 13-valent Conjugate Vaccine [Diphtheria CRM197 Protein]). The vaccine also contains capsular polysaccharide conjugates for seven additional serotypes (8, 10A, 11A, 12F, 15B, 22F and 33F) that cause invasive pneumococcal disease (IPD), 5,6,7,8,9 and have been associated with high case-fatality rates, 10,11,12,13 antibiotic resistance, 14,15,16 and/or meningitis. 17,18 PREVNAR 20 helps protect against disease caused by the 20 Streptococcus pneumoniae serotypes in the vaccine. On June 8, 2021, Pfizer announced the U.S. Food and Drug Administration (FDA) approved PREVNAR 20 for the prevention of invasive pneumococcal disease and pneumococcal pneumonia in adults aged 18 years or older. On September 30, 2022, the FDA approved the addition of information in the PREVNAR 20 prescribing information regarding coadministration with an influenza vaccine, adjuvanted (Fluad Quadrivalent 19 ), in adults aged 65 years or older. INDICATIONS FOR PREVNAR 20 PREVNAR 20 ® is a vaccine indicated for: the prevention of invasive disease caused by 20 Streptococcus pneumoniae strains (1, 3, 4, 5, 6A, 6B, 7F, 8, 9V, 10A, 11A, 12F, 14, 15B, 18C, 19A, 19F, 22F, 23F, and 33F) in individuals 6 weeks and older. the prevention of otitis media (middle ear infection) caused by 7 of the 20 strains in individuals 6 weeks through 5 years. active immunization for the prevention of pneumonia caused by Streptococcus pneumoniae strains 1, 3, 4, 5, 6A, 6B, 7F, 8, 9V, 10A, 11A, 12F, 14, 15B, 18C, 19A, 19F, 22F, 23F, and 33F in individuals 18 years of age and older. The indication of PREVNAR 20 for the prevention of pneumonia caused by S. pneumoniae serotypes 8, 10A, 11A, 12F, 15B, 22F, and 33F in individuals 18 years of age and older is approved based on immune responses. Continued approval may depend on a supportive study IMPORTANT SAFETY INFORMATION FOR PREVNAR 20 PREVNAR 20 ® should not be given to anyone who has had a severe allergic reaction to any component of PREVNAR 20 or to diphtheria–toxoid-containing vaccine. Individuals with weakened immune systems may have a lower immune response. Safety data are not available for these groups. A temporary pause in breathing after getting the vaccine has been observed in some infants who were born prematurely. For premature infants, talk to your doctor about the infant's medical status when deciding to get vaccinated with PREVNAR 20. In individuals 2, 4, 6, and 12 through 15 months of age vaccinated with a 4-dose schedule, the most common side effects reported at a rate of >10% were irritability, pain at the injection site, drowsiness, decreased appetite and injection site redness, injection site swelling, and fever. In individuals 15 months through 17 years of age vaccinated with a single dose, the most common side effects reported at a rate of >10% were irritability, pain at the injection site, drowsiness, fatigue and muscle pain, decreased appetite, injection site swelling and injection site redness, headache, and fever. In individuals 18 years and older, the most common side effects reported at a rate of >10% were pain at the injection site, muscle pain, fatigue, headache, and joint pain. Also, injection site swelling was common in individuals 18 years through 59 years of age. Ask your doctor about the risks and benefits of PREVNAR 20. Only a doctor can decide if PREVNAR 20 is right for you or your child. View the full Prescribing Information. About Pfizer: Breakthroughs That Change Patients’ Lives At Pfizer, we apply science and our global resources to bring therapies to people that extend and significantly improve their lives. We strive to set the standard for quality, safety and value in the discovery, development and manufacture of health care products, including innovative medicines and vaccines. Every day, Pfizer colleagues work across developed and emerging markets to advance wellness, prevention, treatments and cures that challenge the most feared diseases of our time. Consistent with our responsibility as one of the world's premier innovative biopharmaceutical companies, we collaborate with health care providers, governments and local communities to support and expand access to reliable, affordable health care around the world. For 175 years, we have worked to make a difference for all who rely on us. We routinely post information that may be important to investors on our website at www.Pfizer.com. In addition, to learn more, please visit us on www.Pfizer.com and follow us on X at @Pfizer and @Pfizer News, LinkedIn, YouTube and like us on Facebook at Facebook.com/Pfizer. DISCLOSURE NOTICE: The information contained in this release is as of October 23, 2024. Pfizer assumes no obligation to update forward-looking statements contained in this release as the result of new information or future events or developments. This release contains forward-looking information about PREVNAR 20 ® (20-valent Pneumococcal Conjugate Vaccine), including its potential benefits and a vote by ACIP to expand its recommendation for the use of certain pneumococcal vaccines, including PREVNAR 20 for all adults aged 50 and older and for adults aged 19–49 years with certain underlying conditions or risk factors who have not received a PCV or whose vaccination history is unknown, that involves substantial risks and uncertainties that could cause actual results to differ materially from those expressed or implied by such statements. Risks and uncertainties include, among other things, uncertainties regarding the commercial success of PREVNAR 20 and uncertainties regarding the commercial impact of ACIP’s recommendation; the uncertainties inherent in research and development, including the ability to meet anticipated clinical endpoints, commencement and/or completion dates for our clinical trials, regulatory submission dates, regulatory approval dates and/or launch dates, as well as the possibility of unfavorable new clinical data and further analyses of existing clinical data; the risk that clinical trial data are subject to differing interpretations and assessments by regulatory authorities; whether regulatory authorities will be satisfied with the design of and results from our clinical studies; whether and when any biologics license applications may be filed in any other jurisdictions for PREVNAR 20 for any potential indications; whether and when any such applications that may be pending or filed may be approved by regulatory authorities, which will depend on myriad factors, including making a determination as to whether the product’s benefits outweigh its known risks and determination of the product’s efficacy and, if approved, whether PREVNAR 20 will be commercially successful; decisions by regulatory authorities impacting labeling, manufacturing processes, safety and/or other matters that could affect the availability or commercial potential of PREVNAR 20; uncertainties regarding the ability to obtain recommendations from vaccine advisory or technical committees and other public health authorities regarding PREVNAR 20 and uncertainties regarding the commercial impact of any such recommendations; uncertainties regarding the impact of COVID-19 on our business, operations and financial results; and competitive developments. A further description of risks and uncertainties can be found in Pfizer’s Annual Report on Form 10-K for the fiscal year ended December 31, 2023, and in its subsequent reports on Form 10-Q, including in the sections thereof captioned “Risk Factors” and “Forward-Looking Information and Factors That May Affect Future Results”, as well as in its subsequent reports on Form 8-K, all of which are filed with the U.S. Securities and Exchange Commission and available at www.sec.gov and www.pfizer.com . ________________________________ 1 U.S. Census Bureau. Population by age. https://data.census.gov/table?q=Population%20by%20age. Accessed October 2024. 2 Perdrizet J, Chilson E, Wasserman M, et al. Current and future pneumococcal conjugate vaccine serotype-specific burden in the United States adult population. Abstract No. ISP20-287 Presented at ISPPD-12, Toronto, June 21-25, 2020. Available at: https://cslide.ctimeetingtech.com/isppd20/attendee/confcal/presentation/list?q=Perdrizet. 3 U.S. Centers for Disease Control and Prevention. Summary of Work Group Interpretations of EtR and Policy Option on PCV21 Use in Adults. https://www.cdc.gov/acip/downloads/slides-2024-06-26-28/04-Pneumococcal-Kobayashi-508.pdf. Presented June 27, 2024. Accessed October 11, 2024. 4 U.S. Centers for Disease Control and Prevention. Summary of Risk-based Pneumococcal Vaccination Recommendations. https://www.cdc.gov/pneumococcal/hcp/vaccine-recommendations/risk-indications.html. Updated October 10, 2024. Accessed October 11, 2024. 5 Baisells E, Guillot L, Nair H, et al. Serotype distribution of Streptococcus pneumoniae causing invasive disease in children in the post-PCV era: A systematic review and meta-analysis. PlosOne. 2017;12(5): e0177113. 6 Hausdorff W & Hanage W. Interim results of an ecological experiment – conjugate vaccination against the pneumococcus and serotype replacement. Hum Vaccin Immunother. 2016;12(2):358-374. 7 Cohen R, Cohen J, Chalumeau M, et al. Impact of pneumococcal conjugate vaccines for children in high- and non-high income countries. Expert Rev Vaccines. 2017;16(6):625-640. 8 Moore M, Link-Gelles R, Schaffner W, et al. Effect of use of 13-valent pneumococcal conjugate vaccine in children on invasive pneumococcal disease in children and adults in the USA: analysis of multisite, population-based surveillance. Lancet Infect Dis. 2015;15(3):301-309. 9 Metcalf B, Gertz RE, Gladstone RA, et al. Strain features and distributions in pneumococci from children with invasive disease before and after 13-valent conjugate vaccine implementation in the USA. Clin Microbiol Infect. 2016;22(1):60.e9-60.e29. 10 Oligbu G, Collins S, Sheppard CL, et al. Childhood deaths attributable to invasive pneumococcal disease in England and Wales, 2006–2014. Clin Infect Dis. 2017;65(2):308-314. 11 van Hoek, Andrews N, Waight PA, et al. Effect of serotype on focus and mortality of invasive pneumococcal disease: Coverage of different vaccines and insight into non-vaccine serotypes. PlosOne. 2012;7(7):e39150. 12 Stanek R, Norton N, Mufson M. A 32-years study of the impact of pneumococcal vaccines on invasive Streptococcus pneumoniae disease. Am J Med Sci. 2016;352(6):563-573. 13 Harboe ZB, Thomsen RW, Riis A, et al. Pneumococcal serotypes and mortality following invasive pneumococcal disease: A population-based cohort study. PlosOne. 2009;6(5):e1000081. 14 Azzari C, Cortimiglia M, Nieddu F, et al. Pneumococcal serotype distribution in adults with invasive disease and in carrier children in Italy: Should we expect herd protection of adults through infants’ vaccination? Hum Vaccin Immunother. 2016;12(2):344-350. 15 Tomczyk S, Lynfield R, Schaffner W, et al. Prevention of antibiotic-nonsusceptible invasive pneumococcal disease with the 13-valent pneumococcal conjugate vaccine. Clin Infect Dis. 2016;62(9):1119-1125. 16 Mendes RE, Hollingsworth RC, Costello A, et al. Noninvasive Streptococcus pneumoniae serotypes recovered from hospitalized adult patients in the United States in 2009 to 2012. Antimicrob Agents Chemother. 2015;59(9):5595-5601. 17 Olarte L, Barson WJ, Lin PL, et al. Impact of the 13-valent pneumococcal conjugate vaccine on pneumococcal meningitis in US children. Clin Infect Dis. 2015;61(5):767-775. 18 Thigpen MC, Whitney CG, Messonnier NE, et al. Bacterial meningitis in the United States, 1998–2007. NEJM. 2011;364(21):2016-2025. 19 Fluad Quadrivalent is not a Pfizer product Category: Vaccines Media Contact: PfizerMediaRelations@Pfizer.com +1 (212) 733-1226 Investor Contact: IR@Pfizer.com +1 (212) 733-4848 Source: Pfizer Inc.