A boy from Laos reportedly died from a vaccine-derived poliovirus strain. While the threat of it spreading worldwide is minimal, WHO still makes it a priority to eliminate vaccine-derived polio as well as wild polio worldwide.
A boy from Laos reportedly died from a vaccine-derived poliovirus strain. While the threat of it spreading worldwide is minimal, WHO still makes it a priority to eliminate vaccine-derived polio as well as wild polio worldwide.
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