Live updates as Trump threatens tariffs on China, Mexico, Canada and BRICS countries. Follow the latest news on Cabinet picks ...

Here is what we know about polio as a disease, its vaccines and the likely number of lives saved through inoculation.

“So long as polio is still present in the world, the benefits of protecting children against paralysis far exceed any risks of this highly effective vaccine, particularly for the inactivated ...

Here is what we know about polio as a disease, its vaccines and the likely number of lives saved through inoculation. In its early stages, poliomyelitis — known as polio — causes fatigue ...