Wearing mask a must to protect from Covid airborne transmission: Experts

A totals of 239 eminent doctors and scientists have written an open letter to WHO concerning a new scientific emergence of Covid-19 which can spread in the air. WHO has also acknowledged the possibility that the virus can remain in the air in crowded indoor spaces.

If Covid-19 airborne, how does it change things and what measures do we need to take? Here's what experts say.