Later, because they're more likely to have some sort of treatment, there's a large number of studies going on now. Here's an article from the WSJ about how usi

Later, because they're more likely to have some sort of treatment, there's a large number of studies going on now. Here's an article from the WSJ about how using serum from recovered measles patients prevented an outbreak decades before the vaccine was developed. https://www.wsj.com/articles/how-a-boys-blood-stopped-an-outbreak-11582847330 https://www.wsj.com/articles/how-a-boys-blood-stopped-an-out...