Galveston County Daily News, May 4, 2008 UTMB researchers have achieved promising results with a potential new weapon against respiratory syncytial virus, the most common cause of infant hospitalization in the United States. In an effort to find an effective antiviral therapy for RSV, the scientists tested two types of complex, custom-designed molecule to interfere with the genetic machinery that RSV uses to replicate, or copy itself, within cells.