Has anyone read whether or not the UN has declared this outbreak an international public health crisis?

You are probably thinking of the World Health Organization, which has declared an emergency.

statement 1 Feb 2016

"Pregnant women who have been exposed to Zika virus should be counselled and followed for birth outcomes based on the best available information and national practice and policies."

Somebody's getting their arm twisted by the anti-abortion cultists. No way in hell is that what they really want to say.