Every year on World Health Day, the world comes together to raise awareness about critical health issues. In 2026, the focus is clear—preventable diseases are still claiming millions of lives, especially in India. This World Health Day, it’s time to spotlight the 5 most hazardous diseases affecting Indians, understand their risks, and take action toward a healthier future. 1. Cardiovascular Diseases – The Silent Threat On this World Health Day, heart health remains a top conc