What Does a Positive TB Test Look Like?
Last Updated Apr 6, 2020 3:38:30 PM ET

A positive TB, or tuberculin, test appears red and raised at the test puncture site, according to WebMD. For high-risk patients, a small red bump at the site of puncture is considered positive, and for a low-risk patient, a larger red bump is considered positive.
High-risk patients are patients who are immunosuppressed or who have been in contact with patients who have active TB, states WebMD. These patients have a lesser reaction to a TB test and may need a chest X-ray to determine if they have TB. Low-risk patients are on the opposite end of the spectrum and have never been exposed to TB. Their reactions are greater.
More From Reference

What Are the Steps of Presidential Impeachment?

What Does George Soros' Open Society Foundations Network Fund?

The History of the United States' Golden Presidential Dollars

How the COVID-19 Pandemic Has Changed Schools and Education in Lasting Ways

Fact Check: Is the COVID-19 Vaccine Safe?

How Does the 25th Amendment Work — and When Should It Be Enacted?