Infectious diseases:
are diseases that can be transmitted from one person to another directly or through an intermediary, and occur because of special biological organisms.
Infection:
Entering and multiplying infectious pathogens within the body.
Pollution:
The presence of infectious agents on the surface of the body and in the surrounding environment such as clothes, toys, food and drink.
are diseases that can be transmitted from one person to another directly or through an intermediary, and occur because of special biological organisms.
Infection:
Entering and multiplying infectious pathogens within the body.
Pollution:
The presence of infectious agents on the surface of the body and in the surrounding environment such as clothes, toys, food and drink.