If you suffer from gingervitus you may be known as a 'ginger kid'.
Symptoms include red hair, light skin and freckles.
Some people have red hair but not light skin and freckles, those people are called daywalkers.
To learn more on the subject watch the 'Ginger Kids' episode of South Park.
Devan: That poor bastard has gingervitus.
Mike:"Dude is gingervitus an std?"
Doug:"Nah bro you can only catch it if you get bit by one"
Girl 2: Ah the same thing has been happening to me ever since i saw that sexy beast Rupert Grint in Harry Potter and the half blood prince.