+1High
New York Times accurately reports vaccine-derived polio outbreaks caused by low vaccine coverage
“The content of the article is correct: attenuated polio strain type 2 contained in the oral vaccine can – in very rare cases – mutate and cause disease in under-immunized persons. However it might be good to specify that if the vaccine coverage is good, this will not happen (so the vaccine coverage has to be maintained, since it has prevented 13 million cases since 2000, according to the WHO).”