Ever since the beginning of the covid pandemic, one of the big topics of discussion has been whether infection results in lasting immunity. Since the advent of the vaccines, that has expanded in to a discussion about whether prior infection or vaccination provides a higher degree of immunity.
Back in December, I wrote about a study that showed that 90% of people who get covid … Read more
One of the fears of many people in relation to covid has been that the immunity that develops after infection is so short lived that the infection will just keep going around and around and re-infecting everyone (until everyone is dead, I assume).
Two pieces of evidence have been presented to support this belief. The first concerns a few cases of “re-infection” that have been … Read more
“Only a minority of people in Sweden have antibodies, so they can’t have herd immunity!”
That is the most common argument I’ve been hearing for why Sweden can’t have achieved herd immunity. This is in spite of the fact that the rates of hospitalizations and deaths have dropped continuously since the peak in April, and are now stable at basement levels.
The argument is also … Read more
In my previous post on the covid pandemic I mentioned that the body’s main defence against viruses is T-cells, not antibodies, and that the only reason we test for antibodies instead in clinicial practice is because it is easier and cheaper. I also ventured a hypothesis that the levels of population immunity are much higher than is being found in the antibody tests, and that … Read more