Mumps
Mumps is spread from person to person through contact with respiratory secretions, such as saliva from an infected person. When an infected person coughs or sneezes, the droplets aerosolize and can enter the eyes, nose, or mouth of another person. Mumps can also be spread by sharing eating utensils or cups. The virus can also survive on surfaces and then be spread after contact in a similar manner. A person infected with mumps is contagious from approximately seven days before the onset of symptoms until about eight days after symptoms start. The incubation period (time until symptoms begin) can be from 12–25 days, but is typically 16–18 days. 20-40 percent of persons infected with the mumps virus do not show symptoms, so it is possible to be infected and spread the virus without knowing it.
MMR vaccine controversy
The MMR scare caused a low percentage of mumps vaccination (less than 30%), which resulted in outbreaks in Japan. There were up to 2002 measles-caused deaths in Japan while there were none in the UK, but the extra deaths were attributed to Japan's application of the vaccine at a later age. A spokesman for the Ministry of Health said that the discontinuation had no effect in measles, but also mentioning that there were more deaths by measles while MMR was being used. In 1994 the government dropped the vaccination requirement for measles and rubella due to the 1993 MMR scare. Japan is nowadays the only developed country with large measles epidemics. It has been called a "measles exporter" by the US Centers for Disease Control and Prevention. As another consequence of the scare, in 2003, 7 million schoolchildren had not been vaccinated against rubella.