One person is dead after getting the mosquito borne illness known as triple E virus. Health officials say at least four other human cases have been reported in the US this year and now precautions are being taken to reduce the risk. Here's A B C's Alison Kosik officials on alert after New Hampshire reported possibly the nation's first patient this year to die from a rare but potentially severe mosquito borne illness. Eastern equine encephalitis virus. Tripoli officials say the 41 year old was hospitalized with severe central nervous system disease and tested positive for the virus. The human cases of the Tripoli virus are uncommon. The CDC says about 30% of people who develop brain inflammation from the virus will die. There is no vaccine or treatment. Many more who do survive will end up with lifelong physical or mental disabilities. So this is this is a serious virus. This is a serious infection and trucks loaded with pesticides spraying in cities and towns in Massachusetts and New York. As health officials try to protect communities at high risk for mosquito borne viruses. The concerning thing is that risk only increases throughout the summer and into the fall and the risk doesn't actually go away until there's a hard frost that kills off the mosquitoes. Health officials are also concerned as more than 30 states report cases of the West Nile virus, West Nile and Tripoli are only transmitted from a bite from an infected not person to person. Doctors say most people may not have any symptoms but severe cases can present with fever headache, extreme fatigue, gastric distress or seizures. So if you experience any of these seek medical attention immediately, officials say the best way to protect yourself, use a good bug spray, wear long sleeves and pants. If you're outside at dusk and dawn, avoid any standing water as well. Alison Kosik ABC News, New York.