Reply To: mask effect

Srivka
on efficiency –
multiple approaches are published – comparing countries; comparing US states; comparing people on the same ship and same hospital; simulators; comparisons with other viruses – all show that masks decrease virus propagation. In my view, comparing countries and states are suspect – it may be that virus propagation causes more masking. Everything else looks solid.

To answer specific claims:
– virus is small, but it usually travels attached to other particles. Those particles are stopped by filters.
– people are not “extremely careful” in Eretz Israel
– there were studies before COVID, see, or example, he review I posed before