Sometimes, memory aids and mnemonics fall conveniently into place. Other times, the only way to remember something is through its inconvenience, by taking the opposite of whatever it totally should have been.

HHV-6

• Associated with roseola
• Memory aid: roseola has 7 letters, which is inconveniently not 6 but certainly less than 8

HHV-8

• Associated with Kaposi sarcoma
• Memory aid: Kaposi has 6 letters, so it is not HHV-6, while Kaposi’s has 8 characters in it