Explore the comprehensive overview of diabetes mellitus in this 1 hour 40 minute lecture by Dr. Najeeb. Learn about the various types of diabetes, including Type I, Type II, gestational diabetes, LADA, and MODY, as well as their underlying mechanisms and differences. Delve into the complications associated with diabetes, such as vascular diseases, retinopathy, nephropathy, and neuropathy. Understand the impact of diabetes on different body systems, including the cardiovascular, renal, and nervous systems. Gain insights into why diabetic patients are more susceptible to infections and explore specific conditions like diabetic foot ulcers and otitis externa. This comprehensive lecture covers essential topics for medical students, healthcare professionals, and anyone seeking a deeper understanding of diabetes mellitus and its far-reaching effects on the human body.