Parents cite a number of reasons for not immunizing their children, among them: religious values, issues the shots themselves might lead to disease and a belief that enabling children to get sick helps them to create a stronger immune system. Likewise, there is no single description that accounts for why so many more parents who send out their children to private schools evidently share a suspicion of immunizations. Saad Omer, a professor of global health at Emory University in Atlanta who offers studied vaccine refusal in private schools, surmised more private school parents are rich and have the time to spread five shots over some years and stay house should the youngster get a sickness like chickenpox.Abbott receives FDA acceptance for new Chagas assay The U.S. Meals and Medication Administration today authorized the first test for use as an additional, more specific check on individual serum or plasma specimens found to maintain positivity for antibodies to Trypanosoma cruzi . T. Cruzi causes Chagas disease, a significant and possibly fatal parasitic infection.The test, called the ABBOTT ESA Chagas [Trypanosoma cruzi Antigen], can be an in vitro enzyme strip assay for the qualitative detection of antibodies to T. Cruzi. There are two donor screening lab tests certified to detect antibodies to T.