Nelson sent McConnell a letter Friday after health officials confirmed four people in South Florida likely contracted Zika from mosquito bites. The Republican-controlled Congress left on a seven-week vacation without giving the Obama administration any of the $1.9 billion it sought for mosquito control, vaccine development and other steps to battle Zika. Some residents of the Wynwood neighborhood of Miami say they plan to stop eating outside now that four people likely contracted the Zika virus from mosquito bites in South Florida. Puerto Rico health officials are reporting a total of 7,296 Zika cases in the U.S.