World Immunization Day November 10 is World Immunization Day, and in honour of this occasion, here are some facts about immunization and vaccination. What is Immunization, and How Does Your Immune System Work? The immune system is a complex defense system that protects the body from diseases and harmful substances by preventing pathogens from invading. It can distinguish between healthy tissue and unwanted substances by detecting molecular patterns of pathogens. The immune system consists of various components, including: T & B Cells: These cells help by engulfing cellular debris. White Blood Cells (Leukocytes): They are the primary defenders against viruses and bacteria, multiplying to fight pathogens. Spleen: It removes dead pathogens from the body. Thymus Gland: This gland develops lymphocytes called T cells, which play a key role in immune response. Lymphatic...