Bill Gates: 'Almost all' coronavirus vaccines will work by February

Bill Gates is feeling optimistic about coronavirus vaccine development. The first two vaccine candidates likely to receive FDA authorization, one from Pfizer and the other from Moderna, appear to be 95 percent effective against the virus. But the Microsoft co-founder and co-founder of the Bill & Melinda Gates Foundation also has high hopes for vaccines that haven't yet made big headlines, including those developed by AstraZeneca, Johnson & Johnson and Novavax. 'Almost all the vaccines will work and with very high efficacy levels,' Gates told CNN's Fareed Zakaria in an interview on Sunday. 'I'm optimistic that by February it's very likely that they'll all prove very efficacious and safe.'