What if more of us have fought off COVID-19 than we think?

ROCHESTER, Minn. -- It's been a hard couple of months for those who follow the testing of COVID-19 antibodies.

So-called serology research looks for antibodies in the blood that fight the illness, and how many of us have them. Other research looks at how long these antibodies last. The latest results from these studies are said to show us two kinds of bad news -- that immunity after exposure to the illness is not such a sure thing, and that the number of us who have been exposed and fought off COVID-19 are fewer than hoped.

This pushes our goal of herd immunity farther into the distance, potentially even calling it into question altogether. But in measuring antibodies for COVID-19, might we have overlooked other blood markers that help fight off the sickness? Is it possible we are under-estimating both how long immunity lasts, and how close to herd immunity we really are?

https://www.inforum.com/newsmd/coronavirus/6582429-What-if-more-of-us-have-fought-off-COVID-19-than-we-think