Poliovirus

Emerging form of poliovirus threatens hopes for eradication

The oral version of the polio vaccine gives better intestinal immunity than the injected vaccine, a boon in areas where people are often exposed to sewage. But because it’s made with live strains, there is a risk that the virus could escape. Credit: Julien Harneis/Wikimedia Commons Polio is about to be eradicated. By 2018, if all goes according to the World Health …