Infectious diseases are medical conditions caused by harmful microorganisms including bacteria, viruses, fungi, and parasites. These organisms can invade the human body through contaminated food, water, air, insect bites, or direct contact with infected individuals. Some infections remain localized, while others can spread rapidly and lead to global outbreaks or pandemics. Advances in medical science, vaccination programs, and public health awareness have significantly improved prevention and treatment strategies worldwide. Maintaining hygiene, early diagnosis, and strong immunity are essential in controlling the spread of infectious diseases.
Bacterial Diseases
Viral Diseases
Fungal Diseases
Parasitic Diseases