QUESTION
A company was testing a new drug it thought would help decrease the risk
of transmission of a particular virus from mother to fetus. In an experiment
to test the drug, an investigator gave 400 pregnant female rats a small dose
of the experimental drug and inoculated each with the virus. At the same
time, 400 other pregnant rats were inoculated with the virus but not
administered the drug.
Of the rat pups born to the females that received both the virus and the
drug, 203 showed no symptoms of infection; 205 rat pups born to the
virus-only females showed symptoms. From these data, we can best
conclude
ANSWER
nothing because no independent variable could be
identified
nothing because no control group was used in the test of
the drug
that the drug is 5 percent effective and testing on humans
should begin
that the drug enhances disease progression
that the drug has little effect on viral transmission at the
given dosage
