Polio Is Nearly Wiped Out. Covid-19 Could Halt That Progress

The disease once paralyzed 350,000 children each year; vaccination campaigns brought it down to just a few hundred cases. Then, the pandemic struck.

Polio Is Nearly Wiped Out. Covid-19 Could Halt That Progress
The disease once paralyzed 350,000 children each year; vaccination campaigns brought it down to just a few hundred cases. Then, the pandemic struck.
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