People may have to take multiple doses of a coronavirus vaccine for it to be effective against the virus, Bill Gates has said.
The former Microsoft CEO-turned philanthropist has been at the forefront of promoting a vaccination campaign targeting the entire planet, with the Bill & Melinda Gates Foundation calling for global cooperation to administer COVID-19 vaccines to as many as 7 billion people.
“None of the vaccines at this point appear like they’ll work with a single dose,” the billionaire said, speaking to CBS Evening News. “That was the hope at the very beginning. Maybe one of them, particularly in the second generation will surprise us. We hope just two, although in the elderly, sometimes it takes more. So making sure we have lots of elderly people in the trial will give us that data.”
Asked about the ongoing testing of prospective vaccines by companies including AstroZenica and Moderna, Gates admitted that “we don’t know if these vaccines will work. We don’t know if they’ll work to avoid deaths, we don’t know if they’ll work to avoid transmission. That’s why we’re working on so many first generation vaccines and a whole bunch of second generation vaccines that, although they’ll take more time, they are more likely to be extremely effective.”