News 12's Elizabeth Hashagen was joined by Dr. Sharon Nachman to talk about a possible surge of COVID-19 infections in the fall and winter.

The Biden administration is warning the United States could see 100 million coronavirus infections and a potentially significant wave of deaths this fall and winter, driven by new Omicron subvariants that have shown a remarkable ability to escape immunity. Several experts agreed that a major wave this fall and winter is possible given waning immunity from vaccines and infections, loosened restrictions and the rise of variants better able to escape immune protections.

Doctors have started reporting rare cases of patients whose symptoms return several days after completing Paxlovid's five-day regimen of pills. That's prompted questions about whether those patients are still contagious and should receive a second course of Paxlovid. Last week, the Food and Drug Administration weighed in. It advised against a second round because there's little risk of severe disease or hospitalization among patients who relapse.

Both Pfizer and Moderna are working on new booster shots that combine different versions of the coronavirus to protect against variants, but it remains unclear whether they will be more effective than existing vaccines.

Severe COVID-19 cases may cause cognitive impairment equivalent to aging 20 years and losing 10 IQ points, according to a new study conducted by researchers at the University of Cambridge and Imperial College London.