Presents medical news briefs as of May 17, 2000. Report which says that ingestion of certain antioxidants in the form of dietary supplements may be harmful; Findings which help explain how the hepatitis C virus persists in the body and possible ways to predict chronic infection; Campaign launched by the National Institute on Drug Abuse which will alert the public to health risks of steroid use; Study which states that many cesarean deliveries are performed prematurely.