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MMLU / A new drug with in vitro activity against HIV is tested on a population of…

Problem

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question

A new drug with in vitro activity against HIV is tested on a population of patients with Western-blot confirmed HIV infections. Out of the 200 individuals in the patient population, 100 are chosen by lottery to receive the drug. The drug, which is tasteless, is administered in a cup of orange juice; the other patients receive pure orange juice. Neither the nurses, doctors, nor the patients know which patients receive the drug. At the end of the study period, the number of CD4+ T cells is determined for all of the subjects. This is an example of a

choices

  1. Case-control study
  2. Case report
  3. Cohort study
  4. Cross-sectional study

subject

virology

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