5 doctors weighed in:

If I got a PPD shot in august 2011, how long are the results valid?

5 doctors weighed in
Dr. Mark Diamond
Pediatrics
2 doctors agree

In brief: Depends

The PPD asseses whether you have had a TB infection.
If not, and you are infected tomorrow your test will change to positive after a period of time. So the test is only good the day it is done.

In brief: Depends

The PPD asseses whether you have had a TB infection.
If not, and you are infected tomorrow your test will change to positive after a period of time. So the test is only good the day it is done.
Dr. Mark Diamond
Dr. Mark Diamond
Thank
Garrett Caldwell
Family Medicine
1 doctor agrees

In brief: PPD

Ppd is a one or two step test for past exposure to tuberculosis.
Results are typically good for 1 year, however you only need them if someone requires you to have the test (school, work, etc.) a positive test does not indicate you have an active TB infection, just that you have been exposed to the organism in the past.

In brief: PPD

Ppd is a one or two step test for past exposure to tuberculosis.
Results are typically good for 1 year, however you only need them if someone requires you to have the test (school, work, etc.) a positive test does not indicate you have an active TB infection, just that you have been exposed to the organism in the past.
Garrett Caldwell
Garrett Caldwell
Answer assisted by Garrett Caldwell, Medical Student
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1 comment
Dr. Klaus d Lessnau
Outdated and should be in the museum. Overused and waste of health care resources. IGRA blood testing is better and more accurate. It is good forever until you have symptoms that suggest tuberculosis.
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