M.P.
Many years ago it was discovered that the incidence of TB was rising. Police officers and inmates had to have a TB test. Officers only once. TB was frequently found among prisoners. When they had symptoms or when the test was positive the inmates had to wear a mask.
When my father was a young man he worked in his father's dairy farm. They had to be tested. Even tho he had no obvious symptoms he tested positive and had to spend weeks in a sanitarium which is a hospital for only TB patients. We no longer have sanitariums because TB is now under control, in part, due to mandatory testing.