 might spend on the internet reading some things, knows by now that coronaviruses mutate. And that's what COVID, SARS-CoV-2 is, as opposed to SARS-CoV-1 that showed up 20 years ago. Now we have SARS-CoV-2 that shows up in 2020. It's a coronavirus. Coronaviruses always mutate. Other viruses mutate.