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New COVID-19 strain causes concern

Scientists are trying to determine if a new strain of coronavirus jeopardizes the work of vaccines. Dr. Ashish Jha tells "CBS This Morning" how the new variant is affecting the battle against the pandemic.

Dec 22, 2020 (02:39)

USS Lincoln back in San Diego after 10 months

USS Lincoln back in San Diego after 10 months

Video of moments after boy shot a teacher

Video of moments after boy shot a teacher

Rubio reacts to Guilfoyle allegations

Rubio reacts to Guilfoyle allegations

NASA SpaceX Crew-12 returns to Earth

NASA SpaceX Crew-12 returns to Earth

Struggling Wisconsin residents get FEMA aid

Struggling Wisconsin residents get FEMA aid

Obama endorses Jackson for senator

Obama endorses Jackson for senator

Miller saw FBI before charges, sources say

Miller saw FBI before charges, sources say

Trump reverses Iran bombing comment

Trump reverses Iran bombing comment

Arizona candidate says she was raped

Arizona candidate says she was raped

Trump takes back comments about Iran bombings

Trump takes back comments about Iran bombings

Alabama braces for Hurricane Isaias

Alabama braces for Hurricane Isaias

Ashley McBryde on Dolly Parton, songwriting

Ashley McBryde on Dolly Parton, songwriting

"Eternally Yours" stars on series premiere

"Eternally Yours" stars on series premiere

Ben Affleck on "Animals"

Ben Affleck on "Animals"

Where to get the latest CBS Mornings Deals

Where to get the latest CBS Mornings Deals

Video shows dog rescuing missing boy

Video shows dog rescuing missing boy

Video shows explosion at U.S. base in Kuwait

Video shows explosion at U.S. base in Kuwait

Trump approves disaster relief for Wisconsin

Trump approves disaster relief for Wisconsin

History of Russian lab where worker died

History of Russian lab where worker died

Iowans react to Trump tariffs, Iran war

Iowans react to Trump tariffs, Iran war

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