WELL, THAT’S ENCOURAGING: Zika expert: ‘Microcephaly may just be the tip of the iceberg.’ “We’re seeing a spectrum. Many have fairly severe central nervous system lesions. There are also a lot of calcium deposits. … Those can cause seizures and cause impairment in terms of function for the brain. We’re also seeing that in some babies, the brains, which usually have wrinkles, are actually smooth. That’s a sign that development of the brain has been impaired. Several of them are also impaired with respect to vision and hearing. It seems like microcephaly may just be the tip of the iceberg. The preliminary evidence is that [some] babies who don’t have microcephaly may also have neurological lesions or birth defects that are not as obvious as microcephaly. We’re really concerned because of Zika, but we need to rule out other causes of congenital infection to really make sure. . . . We know so little. We presume that like other flaviviruses, except for dengue, if you’ve been exposed, you will have long-term immunity to being reinfected.”