In 1999, West Nile virus appeared in a single state, New York, but by summer's end last year the virus had spread to 44 states, infecting 4156 people, according to the U.S. Centers for Disease Control and Prevention in Atlanta. Prior to 1999, the disease, which is spread by mosquitoes, had appeared only in Africa and the Middle East.

As of July 9, 2003, 31 states are reporting West Nile virus activity in birds, horses, and mosquitoes. No human cases have been reported yet this summer, but in recent years most have appeared in the later part of the summer. James Hughes, the CDC's top infectious-disease official, predicts the disease will reach the entire country this year. He is especially concerned about California, which reported just one case last year. The warm climate there, plus the dense population, sets the stage for a mosquito field day.

Not everyone who is infected with West Nile virus gets sick. About 20% develop fever, body aches, and sometimes skin rash and swollen glands. Like the flu, it passes in a few days. In fact, according to physicians, West Nile virus feels so much like the flu that some people don't recognize what it is or call their doctor. About one in 150 people develops encephalitis or meningitis, potentially fatal conditions that cause inflammation of the brain or spinal cord.

To limit West Nile virus, local mosquito-control agencies around the country are spraying insecticides. The CDC and local health officials are urging people to protect themselves by wearing long-sleeved shirts and pants outside at night, using mosquito repellent that contains DEET—a chemical that repels mosquitoes and that the CDC says is safe—and emptying stagnant water from flower pots and other containers.

Traveler's Supply carries a full line of insect repellents for insect-bite protection, such as Ultrathon, the #1 rated insect repellent.

For more information on West Nile Virus, click below to connect to the CDC's website.

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