Masks are working!

CDC recommends them, RKI also while there are still some people who raise doubts, people who are wearing either pseudo-masks or face shields.

So here is another argument by the most contagious airborne disease – measles has a secondary attack rate of >90%. Using masks should have reduced the incidence. And it did – as shown by a recent paper

Average number of measles cases in 2010–2019 and number of measles cases in 2020 reported to TESS (ECDC) by month of statistics during the January to May measles season peaks, EU/EEA and the UK and selected countries.

This is fully backed by live European data 28Sept20