A medical assistant injects a vaccine in a file photo. | Reuters/Michael Buholzer A Christian student at the University of Alabama-Birmingham has challenged the university's mandatory vaccine policy after being blocked from registering for classes this semester despite having been allowed to register past semesters with no vaccinations. Jackie Gale has never had a single vaccination because she believes that the Bible commands Christians to honor God regarding how the care for their bodies and not inject extra chemicals into one's body, according to a letter to UAB President Ray L. Watts and the university's lawyer John Daniel from First Liberty Institute attorney Christine Pratt.