There is no vaccine for Zika virus and it is spreading fast. Consumer Reports is testing mosquito repellents, and have released their ratings to non-subscribers. They found that he most effective repellents had high proportions of picardin or Deet, with one brand based on pil of lemon eucalyptus, Repel Lemon Eucalyptus, scoring well. They give “recommends” to Repel, Sawyer, Off! Deepwoods, and Natrapel.