How to counter vaccine disinformation 

In recent weeks, Moderna and Pfizer have reported promising clinical trial results for a COVID-19 vaccine. Both could be available on a limited basis before the end of the year. But there’s a problem: the rising spread of false and negative information about the safety of the coronavirus vaccine efforts. Host Marco Werman speaks with  K. “Vish” Viswanath, a professor of Health Communication at the Harvard T. H. Chan School of Public Health about who is behind the disinformation and how to contain it.