Microsoft co-founder Bill Gates has warned that people could need multiple doses of a potential coronavirus vaccine to immunize themselves from the coronavirus, CBS News reports.
According to Gates, the multiple doses could end up requiring more than 7 billion vaccinations to be administered worldwide to every person.
“None of the vaccines at this point appear like they’ll work with a single dose,” Gates said. “That was the hope at the very beginning.”
The billionaire philanthropist has donated at least $300 million towards the global effort to combat COVID-19 through the Bill & Melinda Gates Foundation.
“If what you’re trying to do is block all the transmission, then you need to get 70-80% coverage on a global basis. So it’s unbelievably big numbers,” he said.
Gates, who has been warning about the threat of a global pandemic since 2015, admitted that “there will be a lot of uncertainty” about the efficacy of any vaccine, but stressed that it’s a solution “that will improve over time.”