Selenium supplements can slow the rise in virus levels in HIV-positive patients, which allows the number of beneficial CD4 immune cell to increase, according to results of a clinical trial supported by grants from the National Institutes of Health. Low blood levels of selenium have been linked to high HIV virulence and more opportunistic infections, Dr. Barry E. Hurwitz and associates at the University of Miami in Florida report in the Archives of Internal Medicine. In lab experiments, the element suppresses HIV-1 replication. Even when antiretroviral therapy (ART) is widely available, failure to keep the virus suppressed "is relatively common,...