The ID50 is
A) a measure of pathogenicity.
B) the dose that will cause an infection in 50 percent of the test population.
C) the dose that will kill some of the test population.
D) the dose that will cause an infection in some of the test population.
E) the dose that will kill 50 percent of the test population.
Answer: B) the dose that will cause an infection in 50 percent of the test population.
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