CNN CNN Newsroom With Ana Cabrera January 25, 2022 18:10:00
Know. this happens again every year, for example, with the flu. you have the best scientific information of what may be coming. and sometimes you get it at 80%. sometimes the virus is much smarter than us and it mutates to something that the vaccine doesn't work very well against. >> health advisers in israel say they have this data that shows a fourth vaccine dose provided people with more than three times the level of protection against serious illness and it also doubled the protection against infection. dr. fauci told me yesterday here in the u.s. we're still waiting for more data to deter...