The issue of world health should be taken seriously, and I believe there should be a ban (to an extent) on travel to Brazil - at least until the zika virus is contained, or better under control. The Summer Olympics this year should expect a low audience level because of these concerns.
Yes, pregnant women should be banned from traveling to Brazil. When ten pregnant women in one state test positive for the disease as a result of travel to Brazil, pregnant women should not longer be allowed to travel to the country to protect their babies. The baby did not choose to go to Brazil and should not have to suffer for it.
In light of the fact that ten women in the U.S. have tested positive for the Zika virus after traveling to Brazil, it is only reasonable that there should be a travel ban, or at the very least travel restrictions, for any pregnant women trying to travel to Brazil. Since the virus targets pregnant women, it makes sense to urge them to practice extreme caution when considering traveling to Brazil.
No, travel to Brazil should not be banned. People should be free to travel where they like, however, travel to certain places, like Brazil, should be followed by a mandatory quarantine to ensure that they are not sick. Steps should be taken from there to prevent the spread of disease.