There's also the possibility that a vaccine would prevent people from being infected in the first place.
But, stressed Silverman, "there are lots of qualifiers because it hasn't actually been proven that it causes disease, although the evidence looks pretty intriguing. This is an area that needs more research."
The U.S. Centers for Disease Control and Prevention has more on chronic fatigue syndrome.
SOURCES: Tamara R. Kuittinen, M.D., emergency physician, Lenox Hill Hospital, New York City; Robert H. Silverman, Ph.D., professor, cancer biology, Cleveland Clinic Lerner Research Institute, Cleveland, Ohio; Oct. 8, 2009, Science, online