Experts worry a recent rise in long COVID cases — fueled by a spike in winter holiday infections and a decline in masking and other measures — could continue into this year.
The Covid pandemic marked the first time people armed with powerful scientific tools could study how the immune system awakens to and develops defenses against a new threat, in real time, in the global population.
Transmission rates are still far below levels from 2022, when there were tens of thousands of cases in the US. But after a quieter year last year, experts say the US is vulnerable to increases in spread in a number of ways.
Recent Comments