Testicular immunology
Mumps is a viral disease which causes swelling of the salivary glands and testes. The mumps virus lives in the upper respiratory tract and spreads through direct contact with saliva. Prior to widespread vaccination programs, it was a common childhood disease. Mumps is generally not serious in children, but in adults, where sperm have matured in the testis, it can cause more severe complications, such as infertility.
Melanie's Marvelous Measles
Independent data shows that measles causes the most vaccine-preventable deaths of any disease, resulting in about 96,000 deaths in 2013, and the vaccine is 97% effective after two shots. Measles is highly contagious – before immunization in the United States there were between three and four million cases annually – and the fatality rate is approximately 0.2% of those infected. Most of those who are infected and who die are less than five years old.