“About one in 5,000 vaccinated Americans have tested positive for Covid each day in recent weeks. The chances are surely higher in the places with the worst Covid outbreaks, like the Southeast. And in places with many fewer cases — like the Northeast, as well as the Chicago, Los Angeles and San Francisco areas — the chances are lower, probably less than 1 in 10,000. That’s what the Seattle data shows, for example. (These numbers don’t include undiagnosed cases, which are often so mild that people do not notice them and do not pass the virus to anyone.” David Leonhard in the NYT (gift article for ND readers): The real chances of a breakthrough infection.

+ “One could reasonably predict that these people will be quite well protected against most — and perhaps all of — the SARS-CoV-2 variants that we are likely to see in the foreseeable future.” If you had it in 2020 and got vaccinated in 2021, your immunity to Covid-19 could be superhuman.