Experts Say Omicron Variant Is More Likely To Re-Infect
Starting Monday, all international travelers are required to have a negative COVID-19 test one day before coming to the U.S.
That includes Americans and people who are fully vaccinated.
The original guidelines required travelers to test negative three days beforehand.
It comes as more states are reporting cases of the new Omicron variant.
Researchers are finding this variant is about 2.5 times more likely to re-infect people compared to the original COVID-19 strain.
Those who are reporting cases so far say their symptoms are mild.
Health experts say vaccines and boosters are critical now as the Omicron and Delta variants continue to spread.
Right now, 71% of American adults are fully vaccinated, and 21% of those people have gotten their booster.