White House pandemic advisor Dr. Anthony Fauci has returned to public duties following his own bout with COVID-19, and is warning that the country could face a new viral surge due to 'waning immunity.' On Tuesday, two weeks after his last public appearance in late June, Fauci appeared on MSNBC and joined a White House press briefing by videoconference to warn about the spread of the BA.5 variant, a subvariant of the Omicron strain. He called on Americans to get vaccine booster shots, and said health officials are now 'recommending' people return to wearing masks in indoor group settings. Fauci,...