Contagious

Contagiousness refers to how easily a disease or infection spreads from one person to another. It depends on factors like the pathogen's ability to infect, how it's transmitted (e.g., through coughing, touching surfaces, or close contact), and the presence of susceptible individuals. Highly contagious diseases, like the flu or measles, can spread quickly and widely, while less contagious illnesses require closer or longer contact. Understanding contagiousness helps in implementing effective health measures to prevent or control outbreaks, such as vaccination, good hygiene, and social distancing.