The World Health Organization officially approved the world’s first malaria vaccine on Wednesday. The approval represents the first step in the vaccine becoming more available to low-income nations, in which malaria kills around 500,000 people a year. (The New York Times)

The Biden administration said the U.S. supply of at-home COVID-19 tests is expected to triple by November. The White House plans to buy another $1 billion worth of tests, following an initial $2 billion investment to boost access to home testing. (Politico)

Takeda has stopped two Phase II trials after testing of a narcolepsy drug spurred safety concerns. The company said it will further examine the risk and benefits of the drug, TAK-994. (Endpoints News)

The WHO released an official definition of “long COVID” for the first time Wednesday, calling it “post COVID-19 condition.” The agency estimates that 10% to 20% of COVID-19 patients endure fatigue, brain fog, depression and other symptoms for months after infection. (CNBC Weekly)

Scientists Benjamin List and David MacMillan have won the Nobel prize in chemistry after finding a new way to build molecules. Their method, asymmetric organocatalysis, has become a crucial step in drug development. (STAT)