But ports have disadvantages, too—most of all, a high risk of developing an infection, a blood clot or even thrombosis. Being vigilant about sterilizing the port site helps cut the risk, so nurses thoroughly train parents on how to cleanse and flush the port. Still, up to 30% of children with ports develop at least one bloodstream infection, according to research published by pediatrician Janna Journeycake, MD, in the journal Haemophilia in January 2008. Journeycake is also assistant professor of pediatrics, division of hematology-oncology, at the University of Texas Southwestern Medical Center in Dallas. Worse still, the infection rate climbs as high as 50% in those who develop an inhibitor, an antibody produced by the immune system in response to the factor product. These children need to infuse daily to fight the inhibitor, thus raising the odds of infection, Journeycake says.