Cowification

We have to thank all the cows out there for the Covid-19 vaccine. For any vaccine, in fact.

By the end of the 18th century, cows were periodically getting infected with the cowpox virus known as variola vaccinia, a virus of the Poxviridae family, which would pass to humans through contact with the cow's udders.

In the 1790s, the English physician Edward J…