Serologic tests are blood tests that look for antibodies in your blood.
They can involve a number of laboratory techniques. Different types of
serologic tests can diagnose various disease conditions. Serologic tests
have one thing in common. They all focus on proteins made by your
immune system. This vital body system helps keep you healthy by
destroying foreign invaders that can make you ill. The process for
having the test is the same regardless of which technique the laboratory
uses during serologic testing.