There are four main types of air pollution sources: mobile sources â such as cars, buses, planes, trucks, and trains stationary sources â such as power plants, oil refineries, industrial facilities, and factories
Incubation Period: Average 9-10 days. Period of Communicability: Highly communicable in the early phase and at the beginning of the paroxysmal cough stage (first 2 weeks). The child is no longer contagious after 5 days of treatment.
Infectious (communicable) period: length of time a person can transmit disease (sheds the infectious agent). Incubation and Latent periods Incubation period: time from exposure to development of disease.he shedding of disease agent in the discharge or excretions. Animal reservoirs Zoonosis is an infection that is transmissible under natural conditions from vertebrate animals to man, e.g. rabies, plague, bovine tuberculosisâ¦.. There are over a 100 zoonotic diseases that can be conveyed from animal to man.