It is, says the World Health Organization, “an extraordinary event.” Polio is spreading to a degree that constitutes a public health emergency. The global drive to wipe out the virus had driven the number of polio cases down from 300,000 in the late 1980s to just 417 cases last […]
But this year, polio has been reported in 10 countries, and there are fears the number could rise. Bruce Aylward, the head of WHO’s polio program, says if the international spread isn’t halted, the virus could easily re-establish itself, particularly in conflict-torn countries like the Central African Republic and South Sudan. The unrest makes it difficult to sustain vaccination efforts, and poor sanitary conditions cause the disease to spread.tweet
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