Herd immunity is when a large percentage of people are immune to a contagious disease. The remaining percentage who are not immune are protected from coming into contact with the disease. Herd immunity is the only way to protect people who are unable to become immune or receive vaccinations because of medical reasons. The more […] Read More
Tuberculosis is thought by many to be a disease of the past, historically referred to as consumption because of the drastic weight-loss associated with the disease. Unfortunately TB is present today in every part of the world. Ten million people develop active TB every year with the majority of cases occurring in Asia and Africa. […] Read More