Health
A new theory asks: Could a mask be a crude ‘vaccine’? – The Indian Express
Masked exposures are no substitute for a bona fide vaccine. But data from animals infected with the coronavirus, as well as insights gleaned from other diseases, suggest that masks, by cutting down on the number of viruses that encounter a person’s airway, mi…

Masks might help to crudely immunize some people against the virus. (Representational)Written by Katherine J. Wu
As the world awaits the arrival of a safe and effective coronavirus vaccine, a team of researchers has come forward with a provocative new theory: that masks might help to crudely immunize some people against the virus.
The unproven idea, described in a commentary published Tuesday in the New England Journal of Medicine, is inspired by the age-old concept of variolation, the deliber…