The goal of eradicating polio worldwide is within sight. But public health officials must make sure that vaccines administered after that point cannot cause a recurrence of the disease. Researchers in Britain have come up with a safe strain that would prevent polio reinfection.

Polio vaccines are stockpiled for use into the foreseeable future to prevent another epidemic of paralytic polio, once the disease is officially eradicated.

Experts say there is always a chance the live, weakened virus used to make the warehoused drugs could escape factories, risking new cases of polio. There have also been instances in which mutated read more >>>

Source : VOANews.Com