The so-called incidence is an important measure in the fight against pandemics. The seven-day incidence indicates the number of new infections in the last seven days per 100,000 population. The 14-day incidence is used to better represent long-term trends.
For example, in Germany, the maximum allowable limit is 50 new infections per 100,000 inhabitants within a week. Such a boundary is not precisely defined in Austria. At the traffic light, the Corona region is set to red if there is a “large cumulative 7-day incidence relative to population size”.