reporter: back to jaqueline vieira. her son daniel is about to go in for treatment. he has a session once a week. she's been lucky, a clinic run by a private foundation is treating him for free. priscila: it was all so unexpected, both for us and for the mothers. many children who've been badly affected cry a lot. treatment can be difficult. but it's important we start early. the initial days following birth are very important. reporter: stimulation exercises and physiotherapy are not paid for by brazil's public health system. jaqueline vieira is relying instead on the clinic for help and on her faith in god. jaqueline: i hope my son will at least be able to walk and talk. then it will be easier. if he can't walk it'll be very tough. i hope he will walk, talk and be able to communicate. it's all in god's hands. the future belongs to god. reporter: she's refusing to give up, hoping somehow to find a way through all the problems -- with zika and microcephaly and brazil's divide between rich and poor. narrator: the next phase of globalization. china is a case in point.
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