In my opinion, I don’t think it’s accurate to say that disease is an “unseen enemy” throughout history. The diseases mentioned by John Aberth are smallpox and the bubonic, also known as the Black Death. They both show symptoms of it taking place inside the human body. So in a way, they are not an “unseen” enemy. For example, the bubonic plague is spread through the bite of a flea. if a person was struck with the bubonic plague, swelling of the lymph nodes or buboes would occur in the neck, armpits, or groin, depending on where the fleas infected the target. Accompanied symptoms would include internal bleeding, high fever, and headaches. This would ultimately end in death. The symptoms of smallpox are another example that disease is a visible