Back in 2022, everyone was surprised (and a little uneasy) when the news was announced that a man in New York had contracted poliovirus (polio, for short). After all, don't all children receive the ...
In its original form, the virus survives in just two countries. But a type linked to an oral vaccine used in other nations has already turned up in the West. By Apoorva Mandavilli Most American ...
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