“By the time we have sufficient information and facts to institute a journey ban, the cat’s previously out of the bag, so to communicate,” Nicole A. Errett, a professor at the College of Washington who has finished research on public well being crisis preparedness, reported in an e mail. “Omicron has presently been detected in other continents. A vacation ban could in principle get some time by lessening the spread of new seed conditions, but we are speaking on the purchase of days to weeks,” she added.