Applicants providing written documentation (with a health-care p

There are two situations in which the TST is not required. Applicants providing written documentation (with a health-care provider's signature) of a TST reaction of 5 mm or greater of induration or applicants who have a history of a severe reaction with blistering to a prior TST may be excluded from this requirement. Applicants in these two groups must undergo a chest radiograph. A verbal history from the applicant of a positive TST reaction is not acceptable.