Johnson & Johnson’s late-stage coronavirus vaccine trial is on pause. ampCoronavirusCOVID-19COVID19COVID19 immune systemDr. Maria Simbraimmune systemIMMUNITYJOHNSONJohnson and JohnsonKDKA-TV News EveningLocal TVpausestrialVaccinevideoVITAMINvlogWhat39sYouTube