UNAIDS last Tuesday urged caution in interpreting a recent study that implied that Kenya's HIV prevalence rate has decreased or is overestimated, Agence France-Presse reports. Researchers administering the Kenyan survey interviewed 8,561 Kenyan men and women to collect health information. In addition, 70% of the participants agreed to have blood samples taken for HIV testing. Researchers found that 6.7% of Kenyans are HIV-positive, compared with a previous estimate of 9.4% by the country's Ministry of Health. UNAIDS in a statement said that the study should not be interpreted as a sign that the severity of Kenya's epidemic has been overestimated. Although the statement said that UNAIDS "welcome(s)" household studies, it questioned the dramatic differences in prevalence rates between men and women.