The nation’s top infectious disease expert warned Sunday that the U.S. must act quickly to prevent a “dangerous” new surge of COVID-19 infections ahead of the holiday season – with many Americans planning to resume indoor gatherings, some for the first time since the start of the pandemic.

Speaking on CNN’s State of the Union on Sunday, Dr. Anthony Fauci urged Americans who have not yet received the COVID-19 vaccine to do so, stressing that regular tests are not a substitute — especially as many Americans prepare to resume holiday travel this year and gather in-person with family and friends.

“We still have about 60 million people in this country who are eligible to be vaccinated who have not been, and that results in the dynamic of virus in the community that not only is dangerous and makes people who are unvaccinated vulnerable, but [one that] also spills over into the vaccinated people,” Fauci told CNN’s Dana Bash.

“We have a lot of virus circulating around. You can’t walk away from the data, and the data show that the cases are starting to go up, which is not unexpected when you get into a winter season,” he continued. “People start to go indoors more and we know that immunity does wane over time.”... Read More: NY1