For instance, if you only get a very faint line, it might be hard to know whether or not that means your results are positive. I know how that feels firsthand. After more than two years of evading ...

Failing a stress test occurs when you can’t complete it due to exhaustion or other factors. Abnormal results may indicate an underlying condition, such as coronary artery disease or a blockage. A ...

The hepatitis A virus (HAV) antibody (AB) total test identifies both types of antibodies that the body produces in response to HAV infection. A reactive result means the test has detected HAV ...

The hepatitis B surface antibody test (HBsAb) detects antibodies in the blood to determine if someone is immune to the hepatitis B virus (HBV). A negative or nonreactive result means the individual is ...

Have you heard of the stress hormone? It is called cortisol. As an essential hormone, cortisol is made by the adrenal glands sitting atop the kidneys. It is called the stress hormone because cortisol ...