What is the Difference Between Infectious and Contagious
The main difference between infectious and contagious is that infectious diseases refer to diseases caused by pathogenic microorganisms like viruses, bacteria, and parasites whereas contagious diseases refer to diseases that spread from one organism to another, through direct or indirect contact.
Infectious and contagious are two adjectives we use to describe diseases. In general usage, it is possible to use these two words interchangeably since both infectious and contagious diseases disease-producing agents like viruses and bacteria cause both.