Experts say the travel ban on the Omicron coronavirus variant may be too late.

“At the time we had enough information to make an order,” said Nicole A. Errett, a professor at the University of Washington who has done research on public health emergency preparedness. No travel, the cat is already out of the bag. in an email. “Omicrons have been discovered on other continents. In theory, a travel ban could lengthen time by reducing the spread of new seed cases, but we are discussing it in order of days to weeks,” she added.