The basic calculation is: 1-1/R0 R0 is around 3. So 1-1/3=0.67 => 67% of population will be infected. That is the situation if we don't do effective measures

The basic calculation is: 1-1/R0 R0 is around 3. So 1-1/3=0.67 => 67% of population will be infected. That is the situation if we don't do effective measures on a population level. Edit: I am unable to math, fixed.