Measles outbreaks are caused by a high concentration of unvaccinated people, poor sanitation, and lack of proper nutrition. The virus is highly contagious and can be spread through infected droplets or contact with contaminated surfaces. Vaccines are effective in preventing outbreaks, but in vaccinated communities, the virus can still spread through a “weak link” of […]
Polio epidemics were first identified in 1894 in Vermont, and in 1916, the virus affected at least 9,000 people in New York City. The worst year for polio epidemics in the US was 1954, with 58,000 cases reported. Today, polio epidemics are most likely to occur in India, Pakistan, Nigeria, and Afghanistan. The disease is […]
