So far it seems only 1 percent have handicapped babies.
I don't have recent sources to verify your stated percentage about newborns; some handicaps show up later.
There are other nervous system developmental issues other than microcephaly to consider; issues that occur after birth, and as the child develops.
Right now , too little is known about long term effects of Zika ;
prior to two years ago, microcephaly was an unknown after-effect of Zika as found in Africa in 1947.
There is still much more to learn about Zika, and we, and the CDC, learn more as time goes on .
Personally, while not a trained virologist,I believe that microcephaly is limited to the Brazilian variant of Zika
after it was affected by environmental exposure to various herbicides and insecticides used in agricultural Brazil.
Viri are known to mutate quickly, due to their simple RNA structure, and thus are quickly responsive to environmental factors.
I believe that this is the case with microcephaly, which I believe will be attributed to the Brazilian variant.
Can you list your source for " 1 percent have handicapped babies " ?