By Arnold R. Grahl
The detection of poliovirus, and even cases of polio, in places where it hasn’t been found for years has demonstrated once again that eradicating a human disease isn’t easy, especially in the final stages.
In recent months, an unvaccinated man in the United States was paralyzed. In the UK, poliovirus was detected in sewage. In Malawi, a child contracted polio. And Mozambique announced its first polio outbreak in 30 years. |