Mumps or Epidemic parotitis is a viral disease of humans. Prior to the development of vaccination, it was a common childhood disease worldwide, and is still a significant threat to health in the third world.

Retinol, the dietary form of vitamin A, is a fat-soluble, antioxidant vitamin important in vision and bone growth. It belongs to the family of chemical compounds known as retinoids. Retinol is ingested in a precursor form; animal sources (milk and eggs) contain retinyl esters, whereas plants (carrots, spinach) contain carotenoids. Tissue cells convert these precursors to retinol, and then to either retinal or retinoic acid. ...

Mumps as related to Vitamin A (Retinol)