Johnson & Johnson says its Covid-19 vaccine booster shot produced strong immune responses during trials, Florida frontline workers shoulder the emotional brunt of rising Covid-19 cases, and Iowa’s governor doubled down on her ban of mask requirements in schools.  » Subscribe to NBC News: http://nbcnews.to/SubscribeToNBC » Watch more NBC video: http://bit.ly/MoreNBCNews NBC News Digital is a collection of innovative and …

The milestone marks the first COVID-19 vaccine to gain full approval in the U.S. Original source (ABC/Youtube)

The U.S. urges people to stay away from Kabul airport amid an ongoing terror threat, FEMA deploy health care workers to overwhelmed Mississippi as Covid cases surge, and cases spike in South Dakota following last month’s Sturgis motorcycle rally.  » Subscribe to NBC News: http://nbcnews.to/SubscribeToNBC » Watch more NBC video: http://bit.ly/MoreNBCNews NBC News Digital is a collection of innovative and …