Are Masks On The Way Back?

Covid is still with us but what has health experts worried is the spread of respiratory disease especially among youngsters in school. As a result, some authorities are suggesting that masks be put back on.  No mandates, at least not yet.  Dr Zain Chagla joins us.  Plus, the world will be eight billion strong as of tomorrow. Good news or bad? And more with some pretty interesting "end bits".