KEELPNO said the patients are from western Attica, but noted that the virus' circulation areas in the current season can not be safely predicted, as WNV's epidemiology is determined by many factors.
A mosquito sample from Weymouth tested positive for the virus - the first in the state this year, according to the Department of Public Health.
At risk populations include the elderly, and people with chronic illnesses. Also, stay indoors during the hours between dusk and dawn, they said.
No human cases of EEE have ever been reported in the City of Suffolk.
Frankovich said every year surveillance testing is done on birds to identify when the virus arrives to the region.
The virus is typically transmitted to humans though infected mosquitoes, and its symptoms can include fever and flu-like illness. West Nile virus was first identified in birds in IN in the summer of 2001.
Eliminating standing water where mosquitoes can breed, such as in buckets, flower pots, bird baths, toys or wading pools.
Personal protective measures, such as wearing long, loose, light-colored clothing and applying insect repellent before going outdoors greatly reduces the risk of mosquito bites. Use a repellent with an EPA-registered ingredient (DEET (N, N-diethyl-m-toluamide), permethrin, picaridin (KBR 3023), oil of lemon eucalyptus [p-methane 3, 8-diol (PMD)] or IR3535) according to the instructions on the product label.
There is no specific treatment or vaccine for West Nile virus in people. Windows and doors without screens should be kept shut, especially at night.