CastlTrAstonDrs, #IDMastadon #publichealth There is the reason to #maskup😷 and Why we should keep 😷 on in the enclose environment ? In the new study show ambient CO2 affects how long #SARSCoV2 remains infectious in air & even subtle increases in CO2 affects both how long #COVIDisAirborne and transmission risk @ukhadds .