For nearly two and a half years, Covid-19 has been center stage in the headlines. And still, this virus is not letting up. Our Covid-19 responses have been trying to play catchup. Health officials are now recommending second booster doses of vaccine for 50 and older and kids 12 and older who are immunocompromised, with the potential to expand eligibility to Americans adults under 50 years old as the latest BA.5 variant takes a foothold.