Moderna says their COVID-19 vaccine triggered an immune response just as effective in the elderly as younger adults. Internal medicine physician Dr. Shoshana Ungerleider joined CBSN with more. AstraZenecaCoronavirusCOVID-19COVID-19 immune systemCOVID19Dr. Shoshana Ungerleiderelderlyimmune systemIMMUNITYinternal medicine physicianModernaModerna39spandemicPROMISINGVaccinevaccine trialsvideoVIRUSVITAMINvlogYouTube
