Our imperfect understanding of the pandemic

Maybe in retrospect, a half century from now, as historians look at all the facts, figures and long-term outcomes, we will understand the pandemic crisis, how it got started, what policies worked and whether honesty and science were sometimes set aside. As for right now, did President Joe Biden do the right thing by banning travel from southern Africa, the apparent birthplace of a new COVID-19 variant called omicron?