New type of vaccine-resistant polio virus

Polio virus (Credit:  Sanofi Pasteur/Flickr)

Polio viruses in black and white (Credit: Sanofi Pasteur/Flickr)

Main Point:

Scientists have found a new strain of polio virus that is thought to be responsible for the major epidemics of polio cases in the recent times. This polio virus is not affected by polio vaccines. Continue reading

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