The MMR vaccine protects against measles, mumps, and rubella (German measles). Many children in the U.S. are immunized as infants and toddlers, but that doesn't guarantee lifetime protection. And not everyone gets vaccinated as a child. Many adults move to the U.S. from countries without immunization programs.
When infected with Lycanthropy, or engaged in Beast Form as a result of Hircine's Ring or completing the Companions questline, persons become fully immune to vampirism. Argonians are naturally resistant to disease, and are 50% less likely than Men or Mer to contract vampirism. PC Disease resistance may fail to prevent vampirism. 2  It is also possible to contract at least one disease (Bone Break Fever) as a vampire, despite vampires being listed as having 100% disease resistance. 3  PC In some cases, becoming a vampire does not grant the Vampire's Sight ability.
Hives including chronic spontaneous hives can be a complication and symptom of a parasitic infection, such as blastocystosis and strongyloidiasis among others. The rash that develops from poison ivy, poison oak, and poison sumac contact is commonly mistaken for urticaria. This rash is caused by contact with urushiol and results in a form of contact dermatitis called urushiol-induced contact dermatitis.