Pneumonia is an infection of the air sacs in the lungs, typically caused by a bug, bacteria, or influenza and now, SARS-CoV-2. But doctors say the virus leaves more severe damage in its wake. And now they believe they know…

The immune system of our body is constantly adapting to become better. The immune system becomes better day to day to fight against various bacteria and virus. Our immune system keeps our body in a healthy and a safe state.…