Masks have been pitched as a no-cost intervention that ought to be continued even if evidence for their effectiveness is lacking or...

It is now acknowledged that the dominant means of COVID-19 transmission is not simply airborne transmission, but specifically airborne...

This is part 4 of a 4-part series dedicated to un-masking children. Jump to other parts below. Part 1: The Role of Children in COVID-19...

Image of the internal layer of a medical mask, via scanning electron microscope. Overlaid with expected sizes of most-infectious COVID-19...