Since the outbreak of COVID-19 pandemic, people all across the globe have started using facemasks to prevent the spread of infection from one person to the other. Also the government and health ministries of several countries are encouraging people to wear facemasks whenever they step outside their home. But till date the efficacy of the facemasks in controlling the spread is not determined. So how effective are facemasks against COVID?
This study conducted by Baruch Vainshelboim about the a...
