Do tb test expire?

Yes, they absolutely do! If you mean the skin test, you have to get it read by the nurse within 3 days or you'll have to get poked again. For job or visa requirements, the certificate itself usually expires after 6 months to a year.

I am actually quite new to this and getting my tests done for college. Does the blood test for TB also have a quick expiry date like the skin prick test? I would really appreciate it if anyone could explain this gently.

In my younger days, we had to get these tests done for government jobs. The test result is usually considered fresh only for a year because you can get exposed to the bacteria anytime. Don't worry, getting a re-test is very simple and routine.

Yes, those reports have a shelf life just like a packet of fresh sweets! Usually, universities or employers want a report that is not older than six months. Better to get it done fresh so you don't face any issues.

When I was applying for my visa abroad, they strictly rejected my 8-month-old TB clearance certificate. I had to go to the clinic and get a brand new test done because they only accept reports within a 6-month window.

At this stage in life, even my patience has expired, let alone a medical test! But yes, most medical authorities only accept TB test reports that are less than 6 to 12 months old. Better to just get a fresh one done and avoid the paperwork headache.