6-K

FORM 6-K

U.S. SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Report of Foreign Private Issuer

Pursuant to Rule 13a-16 or 15d-16 of

the Securities Exchange Act of 1934

For the month of March 2023

Commission File Number: 001-38757

TAKEDA PHARMACEUTICAL COMPANY LIMITED

(Translation of registrant’s name into English)

1-1, Nihonbashi-Honcho 2-Chome

Chuo-ku, Tokyo 103-8668

Japan

(Address of principal executive offices)

Indicate by check mark whether the registrant files or will file annual reports under cover Form 20-F or Form 40-F.

Form 20-F  ☒            Form 40-F  ☐

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(1):  ☐

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EXHIBIT

Exhibit Number
99.1	QDENGA Investor call Presentation 2023

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

	TAKEDA PHARMACEUTICAL COMPANY LIMITED
Date: March 16, 2023	By:	/s/ Norimasa Takeda
		Norimasa Takeda Chief Accounting Officer and Corporate Controller

EX-99.1

QDENGA: TRANSFORMING DENGUE PREVENTION President, Global Portfolio Division March 15, 2023 EST / March 16, 2023 JST Ramona Sequeira Vice President, Head of Dengue Global Program Derek Wallace Professor, Programme in Emerging Infectious Diseases, Duke-NUS Medical School Eng Eong Ooi Guest Speaker: This material is prepared and distributed solely for the purpose of providing information about Takeda's management or business to shareholders, investors, and analysts, and is not intended to induce purchase or prescription of any specific drugs and other products. This material is not intended for healthcare professionals, patients, or other persons other than those mentioned above. This material is prohibited from being used by persons other than those mentioned above and for the purpose other than one mentioned above.

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Investors are encouraged to review the definitions and reconciliations of non-IFRS financial measures to their most directly comparable IFRS measures, which are in the financial appendix appearing at the end of this presentation. Exchange Rates In this presentation, certain amounts presented in Japanese yen have been translated to US dollars solely for the convenience of the reader. Except where otherwise noted, these convenience translations have been made at an exchange rate of 1USD = 131.81 JPY, the Noon Buying Rate certified by the Federal Reserve Bank of New York on December 30, 2022. The rate and methodologies used for these convenience translations differ from the currency exchange rates and translation methodologies under IFRS used for the preparation of Takeda’s consolidated financial statements. These translations should not be construed as a representation that the relevant Japanese yen amounts could be converted into U.S. dollars at this or any other rate. Medical information This presentation contains information about products that may not be available in all countries, or may be available under different trademarks, for different indications, in different dosages, or in different strengths. Nothing contained herein should be considered a solicitation, promotion or advertisement for any prescription drugs including the ones under development. IMPORTANT NOTICE 2

3 Ramona Sequeira President, Global Portfolio Division Gary Dubin President, Global Vaccines Business Unit Joined by Special Guest Derek Wallace Vice President, Head of Dengue Global Program Renata Campos President, Growth and Emerging Markets Business Unit Eng Eong Ooi Professor, Programme in Emerging Infectious Diseases, Duke-NUS Medical School Presenting Q&A TODAY’S SPEAKERS

DENGUE – TOP 10 THREAT TO GLOBAL PUBLIC HEALTH Ramona Sequeira – President, Global Portfolio Division

DENGUE IS LISTED BY THE WORLD HEALTH ORGANIZATION AS ONE OF TEN THREATS TO GLOBAL HEALTH1 Severe dengue is a leading cause of hospitalization and death in children and adults of all ages in endemic regions,2 resulting in a high burden on healthcare systems Endemic in over 125 countries; 70% of the burden in Asia2 >125 390M 390M estimated infections and​ 500,000 hospitalizations each year, with an estimated death rate of 20-25,000 per year, primarily in children2,4,5​ Global incidence rates have increased 30-fold over the last 50 years due to urbanization, travel and climate change6 Growing prevalence Significant economic burden of disease; families in endemic regions may spend 15-23% of monthly household income for hospitalizations7,8 5 Dengue is a leading cause of fever among travelers returning from Latin America, the Caribbean & Southeast Asia More than 90 million arrivals from the United States, Canada and Europe to dengue endemic countries in 20183 >3.9 Billion people are at risk of dengue infection globally2 Urgent need for a safe and effective vaccine for endemic and travel markets 1 .World Health Organization. Ten threats to global health in 2019. Retrieved October 2022. 2. World Health Organization. Fact Sheet. Dengue and Severe Dengue. January 2022. Retrieved October 2022. 3. Bulugahapitiya, U., Siyambalapitiya, S., Seneviratne, S. L., & Fernando, D. 3. J. (2007). Dengue fever in travellers: A challenge for European physicians. European journal of internal medicine, 18(3), 185– 192. https://doi.org/10.1016/j.ejim.2006.12.002 4. Guzman MG, Halstead SB, Artsob H, et al. Dengue: a continuing global threat. Nat Rev Microbiol. 2010;8(12 Suppl):S7-S16. doi:10.1038/nrmicro2460.​ 5. Schaefer T, Panda P, Wolford R. Dengue Fever. April 2022. Retrieved October 2022. 6. Ebi KL, Nealon J. Dengue in a changing climate. Environmental Research. 2016;151:115-123. doi:10.1016/j.envres.2016.07.026 7. Tozan Y, Ratanawong P, Sewe MO, Wilder-Smith A, Kittayapong P. Household costs of hospitalized dengue illness in semi-rural Thailand. PLoS Negl Trop Dis. 2017;11(9):e0005961​ 8. Senanayake MP, Jayasinghe SSK, Wijesundera DS, Manamperi M. Economic cost of hospitalized non-fatal Paediatric Dengue at the Lady Ridgeway Hospital for Children in Sri Lanka. Sri Lanka Journal of Child Health. 2014;43(4):205. doi:10.4038/sljch.v43i4.7762

Create awareness of the health and economic risks associated with dengue for consumers living or traveling to endemic regions Build confidence with regulators, recommending bodies, HCPs and consumers by leveraging strong clinical profile QDENGA STRATEGIC LAUNCH IMPERATIVES Ensure launch preparedness through increased manufacturing capacity, established supply network and proven global commercial capabilities Establish rapid and broad access at an individual- and population-level 6

TODAY’S AGENDA Dengue Burden and Control – Eng Eong Ooi BMBS, PhD, FRCPath Professor Programme in Emerging Infectious Diseases, Duke NUS Medical School. Singapore QDENGA Program and Clinical Results – Derek Wallace QDENGA Commercial Outlook – Ramona Sequeira Q&A – Ramona Sequeira, Derek Wallace, Gary Dubin, Renata Campos and Eng Eong Ooi 7

Dengue burden and control Why the world needs a vaccine Eng Eong Ooi BMBS, PhD, FRCPath Professor Programme in Emerging Infectious Diseases

Driven by • Urbanization • Global warming • Increased global travel • More mosquitos • More mosquito / people contact • More than 4 billion people are at risk and estimated 390 million infections per year1 • 30 times increase in disease over the past 50 years2 THE GLOBAL BURDEN OF DENGUE 1. World Health Organization. Fact Sheet. Dengue and Severe Dengue. January 2022. Retrieved October 2022. 2. WHO. Global Strategy for Dengue Prevention and Control 2012–2020. Available at: www.who.int/ denguecontrol/9789241504034/en/ 3. Messina, J.P., Brady, O.J., Golding, N. et al. The current and future global distribution and population at risk of dengue. Nat Microbiol 4, 1508–1515 (2019). https://doi.org/10.1038/s41564-019-0476-8. 4. European Centre for Disease Prevention and Control, https://www.ecdc.europa.eu/en/publications-data/geographical-distribution-dengue- cases-reported-worldwide-2021 • By 2080, more than 6 billion people are estimated to be at risk3 Geographical distribution of dengue cases reported worldwide, 20214 9

DENGUE SYMPTOMS AND PRESENTION VARIES 10 Severe dengue is present in 5% of cases2,3. High plasma viral load and NS1 levels have been associated with plasma leakage, a hallmark of severe dengue4 Most dengue infections are asymptomatic or lead to mild illness with flu-like symptoms1 1. World Health Organization. https://www.who.int/news-room/fact-sheets/detail/dengue-and-severe-dengue 2. CDC. Travelers’ Health- Yellow book. New York: Oxford University Press; 2020. 3. Wilder-Smith A. Current Infectious Disease Reports. 2018;20:50 4. Clinical Infectious Diseases, Volume 72, Issue 12, 15 June 2021, Pages e1074–e1083, https://doi.org/10.1093/cid/ciaa1840 CDC image

1. Salje et al, Nature 2018 RISK OF SEVERE DENGUE PEAKS WITHIN A NARROW RANGE OF PRE-INFECTION ANTIBODY LEVELS1 11

DENGUE TYPES 1 AND 2 CAUSE MAJORITY OF OUTBREAKS 12 Four strains of the dengue virus (DENV) 1-4 are spread by the Aedes aegypti and Aedes albopictus mosquitos worldwide In recent years, DENV-1 and DENV-2 have emerged as the most prominent strains associated with known outbreaks1 - According to empirical data, the highest pooled mortality rate has been reported during DENV-2 outbreaks1 - Studies have also shown that DENV-2 causes more severe secondary infections than other serotypes1 1. Yenamandra, S.P., Koo, C., Chiang, S. et al. Evolution, heterogeneity and global dispersal of cosmopolitan genotype of Dengue virus type 2. Sci Rep 11, 13496 (2021). https://doi.org/10.1038/s41598-021-92783-y DENV-1 DENV-2 DENV-3 DENV-4

Dengue outbreaks occur every few years1 Hospitals can become overwhelmed with the spike in cases2 1. Clin Epidemiol. 2013; 5: 299–309. Published online 2013 Aug 20. doi: 10.2147/CLEP.S34440 2. PLOS. Neglected Tropical Disease. Societal impact of dengue outbreaks: Stakeholder perceptions and related implications. A qualitative study in Brazil, 2015. 13

Current efforts for dengue control are directed at reducing infection rate through vector control methods In the medium to long term, this could cause lower population immunity and make them more susceptible to dengue outbreaks Elevating immunity levels with vaccination is the missing link in integrated dengue control WITHOUT VACCINATION, DENGUE CONTROL LACKS SUSTAINABILITY Dengue and Aedes population density in Singapore – 1966 to 20221 1. Data from Ministry of Health, Singapore Adapted from Ooi et al, Emerg Infect Dis 2006 14

DEVELOPING SAFE AND EFFECTIVE VACCINE FOR A BROAD POPULATION Derek Wallace, MBBS – Head of Dengue Global Program

DENGUE VIRUS INFECTIONS HAVE A DISTINCT PATHOPHYSIOLOGY 16 Potential for disease enhancement2 • Dengue virus non-structural (NS) protein 1 can trigger vascular leakage • NS1 protein is highly conserved across the four dengue serotypes • No specific treatment options exist to manage vascular leakage Severe dengue infections are characterized by vascular leakage associated with a high risk of hospitalization and mortality2 • After an initial infection, a subsequent infection with a different serotype can lead to more severe outcomes • There is no method of predicting or preventing disease enhancement in patients 1. An estimated 1 in 4 dengue virus infections are symptomatic. Symptomatic dengue virus infection most commonly presents as a mild to moderate, nonspecific, acute febrile illness. Approximately 1 in 20 patients with dengue virus disease progress to develop severe, life-threatening disease called severe dengue. Severe disease, although rare, is unpredictable and typically affects children1,2 2. Guzman, M., Gubler, D., Izquierdo, A. et al. Dengue infection. Nat Rev Dis Primers 2, 16055 (2016). https://doi.org/10.1038/nrdp.2016.55

T- and B-cells reactive against dengue antigens Support long-term immunity against dengue infections with different serotypes QDENGA: ENGINEERED TO ELICIT A BROAD AND LASTING IMMUNE RESPONSE AGAINST ALL DENGUE SEROTYPES 17 WITH THE GOAL TO DEMONSTRATE…. Tetravalent QDENGA was engineered: QDENGA VACCINATION HYPOTHESIS Activation of…. With the objective of…. Antibodies against NS proteins cross-reactive against all NS serotypes Reducing risk for severe dengue by preventing vascular leakage induced by NS1 protein Antibodies against structural proteins for serotypes 1-4 Efficiently blocking infection with wildtype virus of all serotypes To contain the structural genes of serotypes 1 to 4 Built on a dengue virus serotype 2 backbone containing dengue virus non-structural genes, including NS-1 protein 1 2 Reduction in Symptomatic Dengue Reduction in Hospitalizations Sustained Protection Against All Serotypes

Ph 3 TIDES Trial PHASE 3 TIDES TRIAL DESIGNED TO ASSESS THE SAFETY AND EFFICACY OF TAK-003 IN BROAD POPULATION 18 1. Serostatus – is whether a patient has had a prior infection or not. 2. Sero-positive (earlier exposure to dengue) and sero-negatives (not exposed before) 57 Active surveillance 0 3 4 15 21 Modified active surveillance Part 1 Part 2 Part 3 Primary efficacy endpoint Secondary efficacy endpoints Month 36 months6 months12 months Participants followed for up to 57 months Trial design met WHO recommendations for a second- generation dengue vaccine – 3-5 years of follow-up prior to licensure Participants stratified by serostatus1 Primary endpoint – prevention of symptomatic dengue cases @ 12mo Key secondary endpoint – reduction in hospitalizations @ 18mo Exploratory endpoint – sustained preventions of symptomatic dengue and reduction in hospitalization @ 4.5yrs 20,000 children & adolescents 8 endemic countries 4/4 Includes all four serotypes Broad Population Both Sero-positive & Sero-negative2

84% reduction in hospitalizations @ 4.5 yrs 19 Strong efficacy across all endpoints Reduction in symptomatic VCD & hospitalizations regardless of previous exposure • No evidence of disease enhancement • Well tolerated • Most frequently reported reactions were common to vaccines, including injection site pain, headache, myalgia, injection site erythema, malaise, asthenia and fever No important identified safety risks3 Durable Reduction in Hospitalizations @ 4.5 yrs (exploratory endpoint)3 SUSTAINED PROTECTION AGAINST ALL DENGUE SEROTYPES & LOWER RISK OF HOSPITALIZATION REGARDLESS OF PREVIOUS EXPOSURE 80.2% reduction in symptomatic VCD @ 12mo (primary endpoint)1 90.4% reduction in hospitalizations @ 18mos (secondary endpoint)2 1 Biswal S, et al. Efficacy of a tetravalent dengue vaccine in healthy children and adolescents. N Engl J Med. 2019; 2019;381:2009-2019 2 Biswal S, et al. Efficacy of a tetravalent dengue vaccine in healthy children aged 4-16 years: a randomized, placebo controlled, phase 3 trial. Lancet. 2020. 2020;395:1423-1433. 3 Tricou, V. Efficacy and Safety of Takeda’s Tetravalent Dengue Vaccine Candidate (TAK-003) After 4.5 Years of Follow-Up. Presented at the 8th Northern European Conference of Travel Medicine; June 2022 VCD – Virologically confirmed dengue

SIGNIFICANT REGULATORY MOMENTUM: QDENGA APPROVED WITH BROAD LABEL REGARDLESS OF SEROSTATUS Approved in Indonesia1 for ages 6- 45 August 2022 EU-M4all application receives Positive CHMP opinion October 2022 US FDA accepts filing November 2022 Approved in EU2 for ages 4 and up December 2022 2023 Approved in Brazil for ages 4 – 603 1. Indonesia National Agency for Drug and Food Control, Badan Pengawas Obat dan Makanan (BPOM) https://www.takeda.com/4a410b/siteassets/system/what-we-do/areas-of-focus/vaccines/pdf/acc_qdenga_smpc.pdf 2. European Medicines Agency https://www.ema.europa.eu/en/medicines/human/EPAR/qdenga 3 Anvisa approval https://www.gov.br/anvisa/pt-br/assuntos/noticias-anvisa/2023/anvisa-aprova-nova-vacina-para-a-dengue 20 Ongoing regulatory reviews in several endemic countries & travel markets QDENGA is approved in Indonesia, EU, UK, Norway, Iceland, Lichtenstein, Brazil EU-M4all The European Medicines Agency. Medicines for use outside the EU — EU-M4all. July 2020. Retrieved March 2021.

QDENGA COMMERCIAL OUTLOOK Ramona Sequeira – President, Global Portfolio Division

Create awareness of the health and economic risks associated with dengue for consumers living or traveling to endemic regions Build confidence with regulators, recommending bodies, HCPs and consumers by leveraging strong clinical profile QDENGA STRATEGIC LAUNCH IMPERATIVES Ensure launch preparedness through increased manufacturing capacity, established supply network and proven global commercial capabilities Establish rapid and broad access at an individual- and population-level 22

COUNTRY-LEVEL ACTIVATION OF STRATEGIC IMPERATIVES INITIATED AHEAD OF EXPECTED APPROVALS 23 Driving consumer awareness of dengue risk and prevalence in THAILAND Establishing trust in dengue prevention in BRAZIL Building a dengue travel business in NON-ENDEMIC COUNTRIES Public Education Partnerships • Partnering with 11 entities to raise public awareness • Ing-Ma virtual human video campaign launched: >35 million views • Partnership with Kao Thailand, top consumer brand Consumer Engagement Initiatives • UNICEF partnership to educate 90,000 people to reduce the transmission of water and vector borne infectious diseases • Dengue prevention social media campaign Critical External Engagements • Partnership with leading travel immunization clinics and HCPs • Ongoing engagements with CDC ACIP dengue working group 70M+ people in country 200M+ people in country 90M+ arrivals from the US, CA & EU* * Bulugahapitiya, U., Siyambalapitiya, S., Seneviratne, S. L., & Fernando, D. 3. J. (2007). Dengue fever in travellers: A challenge for European physicians. European journal of internal medicine, 18(3), 185–192. https://doi.org/10.1016/j.ejim.2006.12.002

ESTABLISH RAPID AND BROAD ACCESS AT AN INDIVIDUAL- AND POPULATION-LEVEL - BRAZIL 24 Initially available to consumers paying out-of-pocket Partnering with large corporations to vaccinate their employees Engaging at a state and municipal level to implement decentralized government programs prior to NIP launch Initiation of National Immunization programs (NIP) # of p eo pl e va cc in at ed Time to program implementation Steps to broaden access happen in parallel, volume increases with each step as we work towards launch of NIP

VARIABLE PRICING APPROACH TO MEET THE NEEDS OF INDIVIDUAL COUNTRIES & MARKET SEGMENTS 25 Implementation of QDENGA has the potential to create significant cost savings for individuals and governments taking into account economic factors such as: cost of care, missed work, lost tourism, etc5 PRIVATE ENDEMIC • Pricing at or below the average price for other innovative vaccines • Tiered pricing corridors based on factors such as GDP & sophistication of healthcare system. Maximum retail price for Indonesia is $40 USD6 per dose1, $26 USD6 ex-factory Average price for innovative vaccines in Indonesia is $73 USD6 per dose2,3 PUBLIC ENDEMIC • Aim to price lower than average for innovative vaccines. • One pricing corridor and a discount matrix. Ensures affordability for all. TRAVEL • Pricing similar to other innovative travel vaccines in their respective countries. Retail price in Germany $115 USD7 per dose1, $80 USD7 ex-factory Average price for innovative vaccines in Germany is $119 USD 7 per dose2,4 1. Two-dose series 2. Dosing regimens vary by vaccine 3. The average retail price obtained based on market survey (printed price on the box) and validated with IQVIA / IPMA data 4. Basket of licensed innovative vaccines in travel markets (unweighted average used for comparison) 5. Shen J, Kharitonova E, Biswal S, Sharma M, Aballea S, Tytula A et al. Disease impact of a new dengue vaccine (TAK-003) in Thailand, International Congress on Infectious Diseases; 17–20 November 2022; Kuala Lumpur, Conference abstract and poster We aim to make QDENGA available to all who are eligible for vaccination in the countries where approved 6. 15117.87 IDR/USD 7. 1.0199 EUR/USD

LAUNCH READY: ESTABLISHED MANUFACTURING & SUPPLY CHAIN AND LEVERAGING BROAD GLOBAL FOOTPRINT 26 • Early investments to established in-house manufacturing for launch • Aim to achieve 100 mill doses per year through in-house and strategic CMO partnerships • Cold chain distribution partner has broad global network. • Existing distribution networks and commercial infrastructure in the initial launch markets • 150 successful commercial launches since 2019 • 14.5% FY2022 Q3YTD revenue growth YoY at CER Manufacturing capacity in place for launch and investing to expand for growth Well-established distribution network Proven track record In Growth & Emerging Markets (GEM) CMO: Contract Manufacturing Organization

GLOBAL EXPANSION THROUGH THE END OF THE DECADE Indonesia, Malaysia, Thailand, Colombia, Brazil, Mexico, Singapore, Sri Lanka, Argentina, US, EU Canada, Israel, Ecuador, Guatemala, Paraguay, Peru, Costa Rica, El Salvador, Panama, Nicaragua, Dom. Rep., Philippines, Hong Kong, Australia, Vietnam China, India, Cuba, Honduras, Venezuela, GAVI, PAHO Target launches in >20 countries by 2025, representing 55% of eligible at-risk population Leveraging EU-M4all review process to potentially accelerate approvals in participating endemic markets FY22-FY24 FY25-FY27 FY28-FY30 FY30+ NEAR-TERM MID-TERM LONG TERM Significant regulatory progress Initiating launches where approved 27 GAVI: Global Alliance for Vaccines and Immunization PAHO Pan American Health Organization

Manufacturing assumptions of 50M+ doses annually24-month data – prior to the 4.5-year data readout STEADY REVENUE GROWTH THROUGH THE END OF THE DECADE 28 Strong Clinical Profile - 4.5-yr data demonstrating durable reduction in hospitalization and no important safety signals consistent with 1° & 2 ° endpoints Momentum with regulators – Brazil, Indonesia & EU approvals with broad labels, regardless of serostatus Expanding manufacturing capacity with aim to achieve annual output 100M+ doses • Continuing to add to in-house capacity and manufacturing efficiencies • Contracting for additional capacity with CMOs; actively exploring potential partners in India and other large endemic markets Previous peak sales estimate of $700M - $1.6B was based on: $1.6 - 2.0B Peak sales

Near-term: Drive Early Adoption Mid-term: Accelerate Volume Growth Long-term: Durable Sales Post Peak SUMMARY OF QDENGA COMMERCIAL OUTLOOK 29 • Launch into key endemic and travel markets – leveraging strong clinical profile • Establish rapid access – Private segment/local partnerships • Ensure affordability through variable pricing approach • Initiation of national vaccination programs will drive volume • Recognize economies of scale to reduce CoGS as volume grows • Continued global expansion into the next decade • Ensure new generations are being vaccinated • Durable sales post peak – Vaccines face limited generic threats due to high barriers to entry

Significant, Growing Global Burden QDENGA – ADDRESSING THE URGENT NEED FOR A SAFE AND EFFECTIVE DENGUE VACCINE 30 Differentiated Clinical Profile5 Delivering Steady Revenue Growth Through the End of the Decade • Demonstrated strong safety and efficacy against all dengue serotypes regardless of previous exposure • Durable reduction in hospitalizations – 84% reduction @ 4.5yrs • No important safety risks identified • >3.9 billion people at risk of infection1 • Growing prevalence – increasing 30-fold over the last 50yrs2 • Significant economic burden of disease both at the government, healthcare systems and patient level3,4 • Peak sales expected to grow to $1.6 - 2.0B USD • Innovative access strategy to drive rapid and broad access • Established manufacturing, supply chain and global footprint to ensure launch readiness 1. World Health Organization. Fact Sheet. Dengue and Severe Dengue. January 2022. Retrieved October 2022. 2. Ebi KL, Nealon J. Dengue in a changing climate. Environmental Research. 2016;151:115- 123. doi:10.1016/j.envres.2016.07.026 3. Tozan Y, Ratanawong P, Sewe MO, Wilder-Smith A, Kittayapong P. Household costs of hospitalized dengue illness in semi-rural Thailand. PLoS Negl Trop Dis. 2017;11(9):e0005961​ 4. Senanayake MP, Jayasinghe SSK, Wijesundera DS, Manamperi M. Economic cost of hospitalized non-fatal Paediatric Dengue at the Lady Ridgeway Hospital for Children in Sri Lanka. Sri Lanka Journal of Child Health. 2014;43(4):205. doi:10.4038/sljch.v43i4.7762 5. QDENGA was assessed across a clinical development program that included 19 Phase 1, Phase 2 and Phase 3 trials, and more than 28,000 participants, including Takeda’s pivotal Tetravalent Immunization against Dengue Efficacy Study (TIDES) trial. The TIDES trial met its primary endpoint of overall vaccine efficacy (VE) against virologically-confirmed dengue (VCD) with 80.2% efficacy at 12-months follow-up. The trial also met all secondary endpoints for which there were a sufficient number of dengue cases at 18-months follow-up. The VE result in preventing hospitalization due to VCD fever was 90.4%. Through four and a half years (54 months after the second dose), QDENGA demonstrated continued overall protection, with sustained overall VE of 61.2% and 84.1% VE against hospitalized dengue. Observations of VE varies by serotype and remained consistent with previously reported results. QDENGA has been generally well tolerated, with no evidence of disease enhancement in vaccine recipients, and no important safety risks have been identified in the TIDES trial, to date.

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