3 ms·
> and are around 90% 90% what? It makes no sense to claim "90% effective". 90% reduction in numbers of people infected? Of droplets inhaled? Of droplets exha
by DanBC 7y ago
> and are around 90%
90% what?
It makes no sense to claim "90% effective".
90% reduction in numbers of people infected? Of droplets inhaled? Of droplets exhaled?
- JoeAltmaier 7y agoSomething like 90% of people with a mask, any mask, not infected after sharing space for an hour or two with sick people. In an airplane. Pretty solid protection.