Hepatitis A blood tests check for immunoglobulin M (IgM) and immunoglobulin G (IgG) antibodies. An IgG-positive and IgM-negative result may suggest immunity to hepatitis A. A doctor may request a ...

After a recent COVID-19 exposure, Dr. Christina Astley tested positive on an at-home test—but just barely. The line signifying a positive result was so faint that Astley, an endocrinologist at Boston ...

As the nation experiences what many experts believe is the second-largest wave of COVID infections since the pandemic started, many Americans will be checking to make sure they don’t have the ...

Most types of breast cancer produce similar symptoms and are discovered the same way—finding a strange new lump during a self-exam, or a healthcare provider spotting something suspicious during a ...

In January 2022, Anthony Arenz, a 51-year-old living in Mesa, Arizona, breathed a small sigh of relief. The Galleri blood test, which screens for 50 types of cancer, hadn't detected any positive signs ...

COVID-19 is alive in new forms and still making people sick. While the pandemic is behind us and infections don’t cause the ...

There are two main types of bacteria, and these categories reflect the microbes' biology and their vulnerability to different antibiotics. When you purchase through links on our site, we may earn an ...