Very good news from papers just published out of Washington state: They tested everybody going on a fishing boat before they left port, and found no active infections and three with antibodies to SARS-COV2. Apparently, somebody was exposed because most of them (over 100) caught it. They had to end the fishing trip prematurely because one person needed to go to the hospital. They tested them, quarantined as needed, and then tested some more. Most all of the infected did develop antibodies or activated T-cells. The very good news: The three who had antibodies before they left did NOT catch it again, even in that highly infective situation.

This is the first proof in humans that antibodies = immunity. It means that most (if not all) the vaccines will work.