According to the Medical Letter on September 17, 2012 there have been increasing cases of West Nile Virus infections (1,993 this year with 87 deaths). A good way to protect yourself is to wear insect repellents when you are going outside to prevent mosquito and tick bites.
Strong repellents such as DEET and Picardin protect the longest up to 6-12 hours. Home treatments like citronella, essential oils, and eucalyptus may be natural but often last less than an hour. Make sure to read the directions to get the best results.
Further information about insect bites and disease prevelence can be found at www.cdc.gov