Drug tests detect illegal substances in the person tested. The most common drug test is a urine test and is frequently used to detect the presence of illegal drugs like opioids, steroids, marijuana, and more.
The viruses responsible for COVID-19 and common influenza (the flu) are similar in many ways. They are both respiratory illnesses, contagious when airborne, and have overlapping symptoms. However, since different viruses cause these illnesses, they differ in a few ways. The question of COVID vs flu is one many people have asked over the last two years, both for their safety and the safety of those around them.
Blood glucose monitoring vs urine testing is a comparison many people make when they suspect they might have high blood sugar. While both tests can be indicators of the presence of diabetes, they produce results that offer diagnostically different information.