>> More Asian countries on alert as Singapore's Zika outbreak continues to worsen. China the latest country to step up border screenings, while Indonesia is placing paramedics at airports. And Japan joins the race to develop a vaccine, backed by US funding. More than 150 cases in Singapore have now been confirmed as of Friday morning, including a second pregnant woman, a particular risk given the viruses link to severe birth defects.
Prime Minister Lee says officials must assume that Zika is elsewhere in Singapore. His government's been spraying down thousands of housing estates with insecticide all week. But new cases are being found beyond the area where it was first detected. So far, Singapore's the only Asian country with active transmission of the virus.
Malaysia found its first case Wednesday in a woman returning from Singapore. The struggles on now for neighboring countries to stop the virus spreading across borders.