Their old definition didn't match usage. Diphtheria and tetanus vaccines use inactivated toxins for example. And the same dictionary said viruses are usually re

Their old definition didn't match usage. Diphtheria and tetanus vaccines use inactivated toxins for example. And the same dictionary said viruses are usually regarded as nonliving extremely complex molecules.[1] I checked 2 dictionaries from before 2020. Neither said a vaccine had to be made from certain things. [1] http://web.archive.org/web/20190118214500/https://www.merriam-webster.com/dictionary/virus http://web.archive.org/web/20190118214500/https://www.merria...