Why would a health-care professional need to wear a respirator to treat a patient with tb?

Its used for protection against airborne with ones who are confirmed and or thought to be infectious. Its for there safety:)

1. b vitamins2. vitamin k3. vitamin d4. examples are walnuts, seeds, tofu5.  total fat, saturated fat, trans fat, cholesterol, sodium, total carbohydrate, dietary fiber, sugars, protein, vitamin a, vitamin c, calcium, and iron.6. 11257. they have to contain reliable information8. less than 10%  9. i didnt read the course so im not surehope that : p