CBC.caSwine Flu Vaccine Looks Safe So FarWebMDAug. 21, 2009 -- No safety issues have come up yet in clinical trials of the swine flu vaccine, health officials announced today. Clinical trials of the vaccine in adults began recently, and so far, there have been "no red flags" of ...Flu drugs inappropriate for healthy adults: studyReutersSwine Flu Vaccine Seems Safe in Early TrialsU.S.