Parameterisation of the interventions
| Intervention |  |  |  |  |  | Details |
| Self-distancing |  | 1 | 1 | 1 | 1 | Constant |
| Self-isolation |  |  | 1 | 1 | 0.2 |  young healthy adults isolated individuals in class j |
| 1 | 1 |  | 1 | i ∈ young healthy adults j ∈ individuals not isolated in class j | ||
| 0 | 0 | 0 |  young healthy adults isolated individuals in class j | |||
| 1 | 1 | 1 |  young healthy adults indiv in class j | |||
| Safety zone |  |  | {0,1} see (*) | {0,1} see (*) | 0.2 |  zone X, j ∈ zoneY(  {green, orange}) |
 |  | 1 | 1 | 1 |  zoneX(  {green, orange}) | |
| Evacuation | 1 | 1 | 1 | 0 | 1 | — |
Values of
, , , and considered in the interventions (see online supplemental materials for their derivations). number of contacts per day of each isolated individual with carers. Total number of isolated cases. Number of tents available for self-isolation. Number of isolated cases of class j. = Heaviside function. maximum number of contacts that individuals in the green zone can have with individuals from the orange zone per day (). Under a ‘lockdown’ of the green zone where visits are reduced by 50% (), and where visits are reduced by 90% (). fraction of the population in the orange (green) zone capable of coming in contact with individuals from the green (orange) zone. if class i is in the green zone and is proportional to if in the orange zone. and generically refer to the total population in either the green () or the orange () zones.*The parameters are set to 0 if health checks to access to the buffer zone are implemented in the intervention and set to 1 otherwise.
