By David Shepardson and Julie Steenhuysen WASHINGTON (Reuters) -The Biden administration will begin redirecting U.S.-bound travelers who had been to Uganda within the previous 21 days to five major American airports to be screened for Ebola as public health officials sent an alert to healthcare workers. The Centers for Disease Control and Prevention (CDC) on Thursday issued an alert to healthcare workers to raise awareness about the outbreak but said there were currently no suspected or confirmed U.S. Ebola cases from the Sudan strain, which is behind the latest Uganda infections. According to…