Understanding Pneumonia: How Germs Invade Our Lungs

Understanding Pneumonia. According to the NIH, “most of the time, our bodies filter the germs from the air we breathe. However, at times, germs such as bacteria, viruses, or fungi can enter our lungs and cause infections. When these germs invade our lungs, the immune system, which is the body’s natural defense against germs, springs […]