COVID-19 | Epidemic characteristics of the new coronavirus

The epidemic characteristics of the new coronavirus include the following aspects:

1. The source of infection, mainly patients with new coronavirus infection and asymptomatic infection, is infectious during the incubation period, and the infection is relatively strong within five days after the onset.

2. The route of transmission. Spread through respiratory droplets and close contact are the main routes of transmission. Also, contact with virus-contaminated items can cause infection. When staying in a relatively closed environment for a long time and exposed to high concentrations of aerosols, there is also the possibility of aerosol transmission. Since the new coronavirus also exists in feces, urine, and another excrement, if these excrements pollute the environment, it will also cause contact transmission or aerosol transmission.

3. Susceptible population, the population is generally susceptible, after infection or vaccination, a certain degree of immunity can be obtained, but the current duration is not clear.

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