Now we need to question where they have vacationed recently.

y is this country always so hysterical with things like this.  It's Zika. Most people who contract it have no adverse symptoms at all.  In others the symptoms are brief and mild with no lasting effects.  The common cold is more uncomfortable than Zika.  The only potential complications are for pregnant women, and even then the chance of birth defects are something like one in a thousand.