> This is not the case with Covid, and people rarely if ever get Covid twice. Beta, Delta and Omikron just called to disagree. In particular Omikron seems to b

> This is not the case with Covid, and people rarely if ever get Covid twice. Beta, Delta and Omikron just called to disagree. In particular Omikron seems to be (speculative at this point!) spreading well amongst the previously infected in South Africa. As a reference point, we are re-infected with the other endemic human corona viruses every 1.5-2 years.