Q: How do I know the state of my immune system? Can I get it tested, and how do I support it? A: It’s normal to catch a few run-of-the-mill infections every year. That may include two to three ...

Like the rest of your body, your immune system ages, too. This contributes to higher rates of illnesses such as respiratory infections. Scientists haven’t found strong data to support any one ...

A strong immune system can fight everything from the common cold to harmful parasites and cancer cells. It's a powerful ally. Here are key ways for optimal performance.