>>> on ominous warning from the says the zika virus is spreading explosively through the western hemisphere hemisphere. it is carried through mosquitos and can make healthy people sick with fever and rash and for pregnant women, could lead to miscarriage or severe birth defects, ten cases already this month come from people who travelled to caribbean or latin america. we spoke to dr. jon lapook. >> we now have over 4,000 suspected cases of babies born with brain defects in brazil, the question everyone is asking is could this effect the united states. >> we do not believe that there will be a major outbreak of zika in the united states, we don't want to be cavalier about it. we want to take it very seriously but if zika acts like the other types of viruses that had experience with, we will see little mini outbreaks like in