A rapid plasma reagin (RPR) test is a blood test used to screen you for syphilis. It works by detecting the nonspecific antibodies that your body produces while fighting the infection. Syphilis is a ...

Whether you're welcoming home a new baby, flying to a new destination for a vacation or working around sick patients as a doctor or nurse, your immunity is your invisible armor against all the bugs ...

An antibody titer test identifies and measures the amount of antibodies in your blood, which indicates the strength of your immune response. Doctors use this test to determine if you’ve had past ...

Genital ulcers could be one of many sexually transmitted diseases or an infection that is not transmitted by sex. An expert walks you through a case. This is the first of a three-part series on ...