Sourav is the founder and sole author of Biology Notes Online. He holds a Master’s degree in Microbiology from Calcutta University and has over 5 years of experience in academic writing, life science content creation.
His content reflects hands-on lab expertise, deep subject knowledge, and a strong passion for simplifying biology for students. Whether it’s genetics, microscopy, or metabolic pathways — Sourav explains it in a way that’s accurate, exam-focused, and easy to remember.
He regularly updates and fact-checks all the material published on this site, ensuring students get trustworthy and updated biology notes with references to real scientific sources.
Immunology is the branch of biological and medical sciences that studies the immune system, which is the body’s defense mechanism against harmful organisms, pathogens (like bacteria, viruses, fungi, and parasites), and other foreign substances. Immunologists work to understand how the immune system functions in both health and disease, including autoimmune disorders, hypersensitivities (like allergies), immunodeficiencies, and the immune response to infection.
Master this topic with AI
Generate flashcards, quizzes, and ask questions to deepen your understanding
