level over t zika outbreak, and president obama has ked congressor $1.8 billion in emergency funding to combat the rus linked to birtdefect also, tomostello exains, there is growing conce ahead of this year's olympic games in >> reporter: with the rio games just six months away, the u.s. olympicmitt tay reiterated cdc guidaehat pregnantomen and anyonho i concned for their healt might conser not goingtheames in august but added we wou not and wil not eventthletes fr cpetingorir cntry should they qualify. top zika experts say is a personal decision. >> it's ry dficult to give adce tpeople whoave devod the last "x" number of years training for that, and what we can doith the cdc and e nih could do is just give them the facts and the evidence-based information. >> reporter: with 4,000 babies alrey agnosethmiochaly ibriltoda e ite hoe asked ngss r ar $billioto srch for a vaccand ramp up the fight. we expect with e warmer nths tcome that more risk will be present, and so this is really a time where neeto scale. >> reporter: the cdcow says its emergency opations center to respond tthe zika outbrea ile on the ground in south florid a proactive ph to wip