Covid-m

When the slope or gradient of the infection or mortality curve, denoted by the letter m, is increasing alarmingly to the point of almost breaking a new record every day as a new wave sweeps across a number of countries, which are often led by inept or corrupt leaders, who are more interested in their political survival than in saving people’s lives.

What value of m in Covid-m would force the authorities in countries or counties with high casualties or fatalities to implement a new lockdown?