> Popular dictionaries actually updated their definition of a "vaccine" in 2021 to accommodate this change Some popular dictionaries noticed their definitions

> Popular dictionaries actually updated their definition of a "vaccine" in 2021 to accommodate this change Some popular dictionaries noticed their definitions were wrong. Merriam Webster's old definition excluded toxoid vaccines like diphtheria and tetanus. And anything produced from a virus.[1] Other popular dictionaries didn't say a vaccine had to be made from certain things. [1] https://news.ycombinator.com/item?id=28486499 https://news.ycombinator.com/item?id=28486499