Experts Say Worst Of Covid-19 Is Behind Us, But They’ve Been Wrong Before: Cautious Messaging Warranted As the Delta variant wave of Covid-19 begins to recede in the U.S., experts are proclaiming the worst is behind us. Well, maybe. Let’s hope. But, the experts have been wrong before, many times, as have our political leaders. It’s time we reassess messaging. Caution and humility are warranted.