The disease is not yet gone. Any surges in cases will lead to a dump in the airline stocks. As shown on the chart, it is likely that people will brave the pandemic in the later part of 2021. We may embrace it and start living normal again.
I guess there is only 1 disease in the US these days..or I do not hear of any others like the old ones, cancer, diabetes, copd, chf, influenza. i am guessing u refer to covid?