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For airborne infection to which the healthcare worker
has immunity (varicella or measles), surgical mask is adequate
- Surgical mask is adequate for all infections spread
by droplet route
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For TB, OSHA mandates use of N-95 particulate respirator
with fit-testing
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For emerging infections with high risk of transmission
to healthcare workers, N-95 is recommended by CDC e.g. SARS, smallpox
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