Infections Immunity

Contagious diseases are illnesses that can spread from one person to another, either directly or indirectly. The term “contagious” refers to the ability of a disease to be transmitted between people, sometimes quickly and across large populations. These diseases are generally caused by infectious agents such as viruses, bacteria, fungi, or parasites. Understanding how contagious diseases spread is important because it helps individuals and communities take appropriate measures to reduce transmission and protect public health.