The decision by U.S. health officials to shorten the recommended COVID-19 isolation and quarantine period from 10 days to five is drawing criticism from some medical experts and could create confusion among many Americans.

To the dismay of some authorities, the new guidelines allow people to leave isolation without getting tested to see if they are still infectious.

The guidance has raised questions about how it was crafted and why it was changed now, in the middle of another wintertime spike in cases, this one driven largely by the highly contagious Omicron variant.

Monday’s action by the U.S. Centers for Disease