Nation | by AFP
Washington
As new, more transmissible variants of the coronavirus spread, experts say it is time to consider using a medical-grade respirator, or wearing a surgical and cloth mask together.
Scientists have agreed for some time the main way the virus is spread is through the air, rather than surfaces, and there’s growing evidence that small droplets from ordinary breathing and speech that can travel many metersare a common mode of transmission.
Added to this is the greater contagiousness of emerging variants…
