Passport Health, an immunization and travel health center with national headquarters in Baltimore, reports that its participation in vaccine trials will expand this year with several new clinical trials in the pipeline. "We're helping pharmaceutical companies and the FDA bring vaccines to market because this cannot be done without successful clinical trials and proper recruitment of patients," says Fran Lessans, RN, MS, Founder & CEO of Passport Health, which is the largest private purchaser of vaccinations in the U.S. Yahoo News (http://biz.yahoo.com/prnews/060613/phtu016.html?.v=62)