Natural-focal disease!
Mei Xin was dazed for a moment before her expression turned grim.
Under most occurrences of such disease, the source, as well as all the possible areas under certain conditions that the pathogens or disease-causing agents, may spread to the surrounding areas, was the focus of infection. Anyone who stumbled upon such areas might get infected. If the source of infection were animals, geographical, climatic, and meteorological factors, it could have a significant impact on the source of infection.
The foremost and indispensable condition for the formation of a focus of infection was the existence of a source of infection. The second essential condition was that the disease-causing agents managed to spread from the source of infection. Each source of infection could form a focus of infection. However, more than one source of infection could exist in a focus of infection.
What exactly was this place?
