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A study of 100 injection drug users who tested negative for HIV infection at enrollment had their HIV status retested at 3-month intervals over a 2-year follow-up period. All of the injection drug users were followed for the entire 2-year period. None died and none were lost to follow-up.
Required:
What frequency measures of HIV infection can be calculated at the end of the study?
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A study of 100 injection drug users who tested negative for HIV infection at enrollment had their HI...
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