What is an individual called who infected with pathogens but shows no sign of illness?

An individual who is infected with pathogens but shows no sign of illness is called an asymptomatic carrier. These individuals can transmit the infection to others, even though they do not experience any symptoms themselves. Asymptomatic carriers can play a significant role in the spread of infectious diseases, as they may be unaware that they are infected and may continue to interact with others, potentially infecting them as well.