2 ms·
It's important to note that the 95% refers to the reduction of mild COVID-19. There is very little data on how well the vaccines actually prevent the spread of
by petertodd 6y ago
It's important to note that the 95% refers to the reduction of mild COVID-19. There is very little data on how well the vaccines actually prevent the spread of illness - often called sterilizing immunity(1) - most of the trials simply weren't doing the extensive PCR testing required to measure that.
There's a good chance they do in fact reduce the spread of COVID-19 too in a significant way, as many vaccines achieve that. But some don't.
The second issue, is that we don't have enough data yet to know if the vaccines prevent severe COVID-19, let alone deaths, in the people most at risk. That at least we'll probably find out soon from the UK.
1) https://thehill.com/changing-america/well-being/prevention-cures/501677-what-is-sterilizing-immunity-and-do-we-need-it https://thehill.com/changing-america/well-being/prevention-c...