But it does offer new details about the events the led to a case that has puzzled researchers. But Swaminathan said the cancer and treatment doesn't totally explain why the man had such extremely high levels. His son, a healthy 38-year-old, became sick five days after visiting his father in the hospital and was diagnosed with Zika. They believe the rare transmission happened primarily because the father's extremely high levels of the virus. "There's no risk of shaking hands with a person who has a typical Zika infection," said Swaminathan, who treated the two.

Source: Fox News September 28, 2016 23:37 UTC