Well....Duh....
FROM THE ARTICLE LINK YOU PROVIDED...
[EXCERPT]
“Almost invariably people who get reinfected, get reinfected with a strain a little bit different than the original strain that infected them. And the new strain tends to evade, partially, the immune protection that the original infection conferred upon you.”
Covid-19 could be treated as equivalent to the flu when community infection was low enough and did not disrupt social order, he said. “Namely, it doesn’t cause the fear, the disruption of the economy, the disruption of our social interactions, the way it has done over the last two and a half years. We’re not there yet.
“I’m sure that coronavirus will be with us for quite a while, maybe indefinitely, so we’re going to have to deal with the fact that this virus does change and create new variants.”
Note: That’s Dr. Fauci speaking