Enteroviruses are relatively stable in the environment, and they can sometimes even survive in chlorinated swimming pools. Infected individuals, including those with asymptomatic infections, often eliminate the viruses in their feces for weeks. Enteroviral meningitis is transmitted by the fecal-oral route, and the peak incidence occurs in the late summer and early fall in temperate climates. Mumps virus is transmitted by the respiratory route, and mumps meningitis is generally most common in the fall and winter months.
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