If you work in a hospital or lab where exposure to TB is possible then get a TB skin test every 6 months to a year, depending on your work setting.
If you are sexually active, you should be tested annually or semi annually.
With fresh fill water, test it each day until it's correct. After that, twice a week will be fine.
once a month
People suspecting they may cone into contact with HIV via work or bad practices, should be tested every 6 months.
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