BBCNEWS BBC News August 19, 2021 16:49:00
That's within 28 days of a positive test. 0ver a1.1 million have received their second dose. it's just pfizer works best initially, but they are equally as effective in the long run. for months, the office for national statistics and oxford university have been asking hundreds of thousands of us to do swabs for their research. do you have any symptoms? it's the biggest study of its kind in the world. unlike other studies, which have looked at how effective the vaccines are at keeping people out of hospital, this one has looked at how good they are at preventing any infection by the delta varia...
Source: archive.org