Dr. Christelle E. Kassis MD

The deadly coronavirus that began as a handful of infections in China and exponentially multiplied around the globe has become one of the largest news stories of the decade.With over 50 million cases of COVID-19 confirmed and over 1 million deaths, the world is struggling on how to contain the virus...

HIV, which stands for human immunodeficiency virus, is an infection that attacks the human being's defense system. When the infection gets into the body, it slowly destroys the immune system, leaving the body weak to various infections. As the virus continues to stay in the body, it develops from...

What is chlamydia?Chlamydia is one of the most widespread sexually transmitted diseases (STDs) in the United States. It is caused by the bacteria Chlamydia trachomatis. Chlamydia infection is more or less like gonorrhea in terms of its symptoms and format of spreading from one person to the other....

Over the course of our four million or so years of evolution, we humans have developed a highly-specialized immune system that is quite a warrior in combating infections. We are bombarded daily by bacterial and viral pathogens which have the potential to cause us serious illness, but, completely...

Lyme’s disease is acquired from the deer ticks which act as its host. The main cause, though, is a bacteria of the Borrelia type that is found in the tick saliva, and then transferred to humans whenever the tick bites.How do you contract Lyme disease?Deer ticks come in contact with humans in the...

Lymphocytes are a type of white blood cell produced in the bone marrow. A few lymphocytes enter the bloodstream while some move into the lymphatic system. Having a low or high lymphocyte count can help identify a person's medical condition. Normal lymphocyte counts usually vary from one laboratory...