Table 1 Parameters of our mathematical models
Parameters | Symbol | Description |
|---|---|---|
Susceptible group | S | People who have no immunity against the disease. They are very likely to be infected by coming in direct contact with infected people |
Exposed group | E | People who have been infected but have not displayed any explicit symptoms. They do not transmit the virus to susceptible people |
Infected group | I | People in the infected group show explicit symptoms of SARS-CoV-2, and they can transmit the virus to susceptible people |
Removed group | R | The removed group includes people who have died of the disease or who have survived the disease. People who have survived the disease will obtain complete immunity against it |
Number | N | The total population |
Infection rate | β | The probability that a susceptible person will become ill after coming into contact with an infected person |
Outflow rate | σ | The outflow rate of the incubation group to the infected group |
Period | γ | The days from infected to removed |
Isolation rate | α | The rate of people moving from the infected group to the hospital isolated group |
Outflow rate | ω | The outflow rate of the infected group to the hospital isolated group |
Vaccination rate | θ | The percentage of susceptible people who receive a vaccination each day |
Number | H | The number of people in the hospital isolation group |
Number | IE | The number of people in the early infection group |
Number | IL | The number of people in the advanced infection group |
Period | γE | Period when patients in the early infected group display explicit symptoms of COVID-19 and can transmit the virus to susceptible people |
Period | γL | Period when patients in the advanced infected group display explicit symptoms of COVID-19 and can transmit the virus to susceptible people |
Number | M | The number of people in the immunity group |