Experts fear of 4th COVID-19 wave as more people start traveling

It was a record-setting weekend for air travel during the pandemic.
Saturday marked the 24th consecutive day that more than 1 million passengers were screened at U.S. airports, according to data from the TSA.
Some flyers attributed COVID-19 fatigue and an increase in vaccine doses administered to the soaring travel numbers.
Top U.S. health officials say the vaccination is the solution to COVID-19 fatigue.
As vaccinations and the virus compete, some states have lifted restrictions
As variants continue to spread, some health experts fear another surge in the U.S.