Sean Faris entered the universe as one such character when he played Ben McKittrick in three episodes of season 1. Ben was a man adrift after graduating from high school, and the vampire Anna took advantage of his listlessness.

Source: https://screenrant.com/vampire-diaries-actors-roles-smallville-characters/

Symptoms appear eight to 13 days after transmission the expert said, including fever, listlessness, conjunctivitis, tearing and runny nose.

Source: https://cyprus-mail.com/2023/05/31/sheep-and-goat-pox-outbreak-detected-in-north/