Brazil Approves First Single Dose Dengue Vaccine As Global Cases Hit Record High

Brazil has cleared a single dose dengue vaccine as global infections reach a record peak. The move aims to protect high risk regions and control rising cases.

Brazilian authorities authorised the world's first single-dose dengue vaccine on Wednesday, hailing it as a "historic" achievement as the mosquito-borne disease spreads worldwide owing to rising temperatures. Dengue fever, which is characterised by strong flu-like symptoms, crushing weariness, and body aches, reached record levels worldwide in 2024, according to studies, and its growth has been connected to climate change.

Brazil Approves First Single-Dose Dengue Vaccine

ANVISA, Brazil's health regulatory organisation, has authorised the use of Butantan-DV, produced by the Butantan Institute in S o Paulo, for individuals aged 12 to 59. According to the World Health Organisation, TAK-003 is now the only dengue vaccine available worldwide, and it requires two doses provided three months apart. The single dose, produced after eight years of research in Brazil, will make immunisation programs faster and simpler.

"This is a historic achievement for science and health in Brazil," said Esper Kallas, head of the Butantan Institute, a public research centre, during a press conference in S o Paulo. "A disease that has plagued us for decades can now be fought with a very powerful weapon," the doctor said. The novel vaccine demonstrated 91.6 per cent efficacy against severe dengue in clinical studies involving over 16,000 participants.

Dengue Spread and Global Impact

Dengue's severe symptoms have earned it the moniker "breakbone fever." It can cause severe hemorrhagic fever and even death. It is transmitted by infected Aedes mosquitoes that have spread outside their usual range, resulting in dengue infections in Europe and portions of the United States where they were not previously present.

Globally, the WHO reported more than 14.6 million illnesses and nearly 12,000 deaths in 2024, the highest ever recorded. Half of these deaths occurred in Brazil. Researchers at Stanford University in the United States published a study in 2024 suggesting that global warming was responsible for 19% of dengue cases that year.

Brazil has secured an agreement with the Chinese business WuXi Biologics to provide around 30 million doses of the vaccine in the second half of 2026, Health Minister Alexandre Padilha announced during a news conference.

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