Measles, mumps and rubella are airborne diseases that spread easily through the air we breathe. Each of these diseases can have devastating effects on the infected person, such as measles which can cause pneumonia, seizures, brain damage and ultimately death. Mumps can cause deafness, meningitis, painful swelling of the testes or ovaries, and infertility. Rubella in pregnant women can lead to miscarriages or serious birth defects. (Vaccines,