They call it "shield immunity". The concept is so intriguing that the journal the paper was published on dedicated an editorial to it, praising the idea but als

They call it "shield immunity". The concept is so intriguing that the journal the paper was published on dedicated an editorial to it, praising the idea but also warning about potential abuses (privacy problems). The fact is that the researchers not only proposed the idea but also tried doing some epidemiological modeling to predict the impact on the spread of the disease, and according to their models, the impact is beneficial.