We just returned from Negril, 12 days. I was worried about the Chick - V also and brought along lots of things to make me feel more comfortable and I'm happy to report none of us (16 in all) were affected. I brought along Eucalyptus/Lemon oil with my diffuser. I ran the diffuser in the morning in our room and it made a difference. One morning I did not use it and was bitten 3 times. I kept this oil as a stand by when Off with Deet was not with us. We also loaded up on vitamin C when we there. We brought tylenol and glucosamine in case someone got sick. We sprayed Deet every morning before heading to the beach and again before sunset. Be vigilant. Go on vacation! Since we did not need the tylenol or joint relief (glucosamine) we left it with friends to share if someone else needed it. It did not rain the entire time we were there. I read the weather is helping to reduce the number of mosquitos also/less or no standing water.