Mumps - susceptibility reaches about 40 The source of the...

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Mumps: Also found worldwide, mumps is endemic with peaks of acute disease appearing from January through May. Epidemics occur every 2-7 years and humans are the only host. Transmission is via salivary secretions and disease is contagious just before and after the symptoms. It is less contagious than Parainfluenza so intimate contact is usually required. In unvaccinated populations, about 45% of people are infected by age 5 and about 95% by 15 years of age. About 35% of those infected are subclinical, however. Measles: Endemic worldwide, epidemics occur every 2-4 years in developed countries when the population
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Unformatted text preview: susceptibility reaches about 40%. The source of the virus is human (respiratory) secretions. Disease generally affects those in the 4-7 year age group. The incidence of SSPE is about 6-20 per million. • RSV: Also endemic worldwide, epidemics occur yearly, usually between January and March. Reinfection is common. The source for infection is the human respiratory tract and disease is usually contagious about 4-5 days after the symptoms. Most infants experience upper respiratory infections but between 15% and 50% experience lower (more serious) respiratory infections....
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