Harvard Global Health Institute Director Dr. Ashish Jha explains the promising findings of several recent studies that found monkeys and humans can develop coronavirus immunity, and what the results mean for a possible vaccine. Coronaviruscoronavirus immunityCOVID-19COVID19doctorHarvardimmune systemIMMUNITYnewsquotquotgoodSharesstudiesvideoVITAMINvlogYouTube