RT @jankluytmans: How much do face masks actually help? 
Quote 1: 200,000 people need to wear a mask to prevent 1 infection/ week.
Quote 2:…
RT @jankluytmans: How much do face masks actually help?
Quote 1: 200,000 people need to wear a mask to preventinfo 1 infection / week.
Quote 2: ...
Wetenschapsredacteur Volkskrant. 'Wherever and whenever you can, count' (Francis Galton). Tweets op persoonlijke titel.
Science Editor Volkskrant. "Wherever and whenever you can, count '(Francis Galton). Tweets personally.