Experts have identified abnormal blood clotting in some Covid patients. Photograph: iStock

Covid-19 is mercurial. When it first emerged in humans, we soon saw that it hits the lungs hard: the virus and our body’s response to the virus can de(...)

A volunteer takes part in a clinical trial  in Cape Town to see whether the Bacillus Calmette-Guerin (BCG) vaccine helps limit the damage caused by Covid-19. Photograph: Rodger Bosch/AFP/Getty Images.

It is easy to be appalled and a bit morbidly amused by suggestions to sunbathe, inject disinfectant and swallow Clorox. This magical thinking and ir(...)