Is Coronavirus Vaccine ready?
As COVID-19 (coronavirus) has spread all over the globe causing a pandemic, we are taking several precautions against it. While everyone is waiting for situations to get better and this arises a question in our mind, Is Coronavirus vaccine ready? before that we must know how our Immune System fights infection, how Vaccines are developed, how Vaccines function. Immune System - Body’s Defense When bacteria or viruses, invade the body, they attack and multiply. This invasion, called an infection, is what causes illness. Blood contains red blood cells, for carrying oxygen to tissues and organs, and white or immune cells, for fighting infection. White cells consists of: Macrophages swallow up and digest germs, plus dead or dying cells. Leave behind parts of the invading germs called antigens. B-lymphocytes Defensive white blood cells Produces antibodies that attack the antigens left behind by the macrophages. T-lymphocytes (Memory Cells) : Stor