WHO’s key mistake early in the pandemic was denying that #COVIDisAirborne. WHO came around in April 2021 well too late. Though @PeterASinger was the key person who I pushed hard & helped me advocate fiercely inside the WHO for airborne. And to his credit, WHO revised soon after👇 https://t.co/l3VCCUd0C1

— Eric Feigl-Ding (@DrEricDing) December 6, 2021