31. Tell me whether you think each of the following statements is true or false or if you don't know.

a. After a person becomes infected with the AIDS virus, it can be weeks before a blood test shows the infection.

34. Tell me whether you think the following statements about the blood test for the AIDS virus infection are true or false or if you do not know whether they are true or false.

b. After a person becomes infected with the AIDS virus, there can be a period of time before the test shows the infection.

34. Tell me whether you think the following statements about the blood test for the AIDS virus infection are true or false or if you do not know whether they are true or false.

b. After a person becomes infected with the AIDS virus, there can be a period of time before the test shows the infection.