Health expert says other COVID-19 variants 'pale in comparison' to delta

Dr. Amesh Adalja, an infectious disease expert, said on Thursday that other COVID-19 strains “pale in comparison” to the delta variant’s ability to infect people.

“Delta is the dominant variant, in all of these other variants kind of pale in comparison when it comes to their ability to infect,” Adalja, senior scholar at the Johns Hopkins Center for Health Security, said during an appearance on Hill.TV’s “Rising.”

“And that's what matters to this virus — just finding more people to infect, and delta is crowding all of the others out,” he added.

Adalja said some variants that have developed “kind of come and go” and do not become widespread, likening it to “Darwinian natural selection.”

“What we're finding is yes, there are other variants that occur even in the United States, but when it comes to delta, because it is so much more fit, because it is so much more efficiently transmitted, these other variants kind of come and go but they never get a toehold because it's just kind of simple Darwinian natural selection,” he said.

Adalja’s comments come as the U.S. is seeing a spike in COVID-19 cases, driven by the delta variant.

The delta variant is currently the dominant strain in the United States. 

Watch part of Adalja’s interview above.