VARIANTS

University of Maryland study found people with a variant breathed out much more of the virus than patients with the original form of COVID-19.

A researcher with Texas Biomed Research Institute says scientists around the world are studying and monitoring the mutation of COVID-19 to see what new clusters of variants stick around.

Five things you need to know about the coronavirus pandemic this Sunday morning.

The UK and other rich nations are urged to show "historic leadership" in sharing vaccines globally.

Doctor responds to Biden's prime-time address, warning about COVID-19 variants In his first prime-time address since taking office, President Biden announced he is directing states to make COVID vaccines available to everyone 18 and older by May 1. He also said the U.S. could see a return to some sort of normalcy by the Fourth of July. Dr. Bob Lahita spoke with CBSN's Anne-Marie Green and Vladimir Duthiers about the president's address and concerns about the variants that continue to spread.

New variants discovered in U.S. raise fears over COVID mutations As new coronavirus cases are on the downward trend, leading public health experts are warning about new variants in the U.S. Carter Evans reports.

U.K. scientists studying genetic code of coronavirus as new variants emerge British scientists say they're concerned after learning the COVID-19 variant first detected in the U.K. has mutated again, which could make vaccines less effective. CBS News visited a lab genetically mapping COVID-19 to understand these new variants. Roxana Saberi reports.

U.K. scientists studying DNA of COVID-19 as new variants emerge British scientists say they're concerned after learning the COVID-19 variant first detected in the U.K. has mutated again, which could make vaccines less effective. CBS News visited a lab genetically mapping COVID-19 to understand these new variants. Roxana Saberi reports.