Some people have weak immune systems from birth due to genetic conditions called primary immunodeficiencies. Certain illnesses like diabetes and HIV can weaken the immune system. Medications like ...

Many people brush off frequent illness as stress, weather changes or simply bad luck. A cold that keeps returning, wounds that seem to take forever to heal or a constant feeling of tiredness often ...

When food is scarce, stress hormones direct the immune system to operate in "low power" mode to preserve immune function ...

A growing number of American adults have weakened immune systems, which can leave them vulnerable to severe illnesses. By Knvul Sheikh Kaley Karaffa had just turned 28 when the reality of having a ...