This is disturbing.
The United States has significantly underreported the number of new H.I.V. infections occurring nationally each year, with a study released here on Saturday showing that the annual infection rate is 40 percent higher than previously estimated.
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Health Guide: AIDS
The study, conducted by the Centers for Disease Control and Prevention, found that 56,300 people became newly infected with H.I.V in 2006, compared with the 40,000 figure the agency has cited as the recent annual incidence of the disease.