An epidemic is a simultaneous outbreak of the same infectious disease within a short period of time.。

Epidemics can be transmitted airborne infection, droplet infection, contact infection, oral infection, through the skin, the blood, and other modes of infection.

The mode of infection will mutate during the epidemic and there may be new discoveries, so please keep yourself updated.

There is a difference between the strength of infection, of the mild symptoms after infection, and with the immediate onset of symptoms.

It is also possible that the disease may have spread before symptoms are detected and isolation/quarantining and observation are required immediately after symptoms are know to be present.

Epidemics with high aggressiveness are generally lethal and leave sequelae or associated diseases.

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