Birx said the South is now expected to see sudden increases in summer and northern states will see big increases in winter — especially during the holidays.
Birx said it is closely following the data from South Africa, which recently saw a spike in new Covid-19 cases.
“Each of these increases is four to six months apart. And that tells me that natural immunity wanes sufficiently in the general population after four to six months — and that a significant increase will occur again,” Birx told Face the Nation. ”
“That’s what we have to be prepared for in this country. We must now prepare for a potential summer surge across the southern US because we saw it in 2020 and we saw it in 2021.”
Birx said public health officials need to make it clear to the public that protection against infection wanes over time, and precautions should be taken with those at risk or at risk.
She said home testing kits for Covid-19 and booster shots are important tools to help Americans deal with surges.