Americans now have a third coronavirus vaccine option after Johnson & Johnson received emergency-use authorization from the Food and Drug Administration for its single-dose shot. The company wants to distribute 20 million doses by the end of March. CBS News transportation correspondent Errol Barnett reports on the rollout from Louisville, Kentucky, and Dr. Ron Elfenbein, the medical director and owner of First Call Medical Center, joined CBSN to discuss.

CBSN is CBS News’ 24/7 digital streaming news service featuring live, anchored coverage available for free across all platforms. Launched in November 2014, the service is a premier destination for breaking news and original storytelling from the deep bench of CBS News correspondents and reporters. CBSN features the top stories of the day as well as deep dives into key issues facing the nation and the world. CBSN has also expanded to launch local news streaming services in major markets across the country. CBSN is currently available on CBSNews.com and the CBS News app across more than 20 platforms, as well as the CBS All Access subscription service.

Subscribe to the CBS News YouTube channel: http://youtube.com/cbsnews
Watch CBSN live: http://cbsn.ws/1PlLpZ7c
Download the CBS News app: http://cbsn.ws/1Xb1WC8
Follow CBS News on Instagram: https://www.instagram.com/cbsnews/
Like CBS News on Facebook: http://facebook.com/cbsnews
Follow CBS News on Twitter: http://twitter.com/cbsnews
Subscribe to our newsletters: http://cbsn.ws/1RqHw7T

Get new episodes of shows you love across devices the next day, stream CBSN and local news live, and watch full seasons of CBS fan favorites like Star Trek Discovery anytime, anywhere with CBS All Access. Try it free: http://bit.ly/1OQA29B