Omicron now found in one-third of US states while Delta remains prominent

Omicron has spread to about one-third of US states, but the Delta version remains the majority of Covid-19 infections as cases rise nationwide

The Omicron variant of the coronavirus has spread to about one-third of U.S. states, but the Delta version remains the majority of COVID-19 infections as cases rise nationwide, U.S. health officials said on Sunday.

Though the emergence of the new variant has caused alarm worldwide, Dr. Anthony Fauci, the top U.S. infectious disease official, told CNN "thus far it does not look like there's a great degree of severity to it." He added that it was too early to draw definitive conclusions and that more study is needed.

Fauci, U.S. President Joe Biden's chief medical adviser, said he also hoped the United