2500 babies with microcephaly is more than just “observer bias”. Typically microcephaly occurs in about 2 to 12 per 10,000 live births.
“2500 babies with microcephaly is more than just “observer bias”. Typically microcephaly occurs in about 2 to 12 per 10,000 live births.”
Observer bias w.r.t. your notion that “zika has always been mild”. Here are the facts: first, Zika had not affected at this scale. And, second, due to the impact of the first, Zika related effects had never been studied.
Now, Zika is infecting a large number of people and is being closely monitored, previously “mild” virus is now deemed dangerous to pregnant women. Well, not as dangerous as abortionists, but that is for another day.