Worse than we thought: only 60% of young healthy adults who got infected actually developed antibodies. The likely explanation is that their own strong immune systems killed off the virus before their bodies made antibodies -- but --

this also questions the assumptions behind the technology most of the vaccines being developed are using.

If many people don't develop antibodies, vaccines that are designed to work by creating antibodies - - obviously won't work in those people.

https://www.yahoo.com/news/even-group-entirel...43759.html