COVID?
1. infected and not self-cured2. infected and self-cured3. uninfected and vaccinated to have antibody4. uninfected and vaccinated but no antibody
Undergo COVID test
take regular COVID test
negative
Does not undergo COVID test and receive second dose vaccination
Antibody
1. uninfected and no antibody2. infected and no antibody3. vaccinated to have antibody4. self-cured to have antibody5. cured and have antibody
COVID+
COVID-
positive
Does not undergo COVID test and receive first dose vaccination
*Herd immunity can be achieved if 60~80% population possess covid antibody
Quarantine and treatment
Individual-based modelling and analysis
Dead
continue to live a normal life
