But those infected with ZIKA, in any of the Caribbean islands, give birth to microcephalic babies too.
Yes, and that demonstrates my point that the Zika in Brazil which is related to microcephally, is different that the Zika found in neighboring Columbia in terms of effects.
I believe it has to do with mutation as a result of exposure to insecticide/ pesticides used in Brazil.
You don't hear of microcephally in the mainland Zika exposure, only in the connective island chain, further demonstrating a virus mutant.
What is the variable between mainland and the island exposure : the frequency of travelers on island hopping cruise ships.
Even today, California is reporting an increase in transmissions, although no currently known native exposure, all brought about by international travelers.
Expect more of the same when travelers return from the Rio Olympics, and those on cruise ships.