Description of the algorithm that converts three parameters included in the national COVID monitoring framework into the risk levels associated with the three pre-determined colours (green/yellow, orange, and red)
| Replicability index* (or Rt according to the Italian notation) | Initial colour assignment† | Additional parameters* | Process of colour assignment revision | Final colour assignment† | ||
| Number of new cases over 14 days normalised to 100 000 subjects | Percentage of ICU beds occupied by COVID-19 patients | |||||
| >1.20 | red | ininfluent | – | ininfluent | n.a. | red |
| between 1.00 and 1.20 | orange | >400 | and/or | >30% | yes | red |
| ≤400 | and | ≤30% | no | orange | ||
| <1.00 | green/yellow | >400 | and/or | >30% | yes | orange |
| ≤400 | and | ≤30% | no | green/yellow | ||
*The official information on these indexes recorded on a daily basis is available at the following internet addresses: https://github.com/pcm-dpc/COVID-19/tree/master/dati-andamento-nazionale (nationwide information) https://github.com/pcm-dpc/COVID-19/tree/master/dati-regioni (region-specific data) https://github.com/pcm-dpc/COVID-19/tree/master/dati-province (data for individual provinces).
†According to the present algorithm.
ICU, intensive care unit; n.a., not applicable.