Good article. I still have some questions, such as how long with vaccine effectiveness last, does effectiveness mean still catching the virus, only in a milder form? If that's the case, why should young people take it at all, since they usually only get a milder illness. Will we still need to wear a mask after being vaccinated, and if so, why? And if the vaccine causes 12 hours or so of illness, is it safe for the eldery and extremely fragile?