It is now predictable that the South will see increases in the summer and northern states will see increases in the winter, especially during the holidays, Birx said.
Birx said he is closely monitoring data from South Africa, which has recently seen a spike in new Covid-19 cases.
“Each of these increases are about four to six months apart. That tells me that natural immunity declines enough in the general population after four to six months that a significant increase will occur again,” Birx told ” Face the Nation”. ”
“This is what we have to be prepared for in this country. We should be preparing right now for a potential spike in the summer in the southern United States because we saw it in 2020 and we saw it in 2021.”
Public health officials need to make it clear to the public that protection against infection declines over time and that precautions should be taken with those who are vulnerable or compromised, Birx said.
She said home COVID-19 testing kits and booster shots are critical tools to help Americans manage surges.