  The World Health Organization (WHO) made the assessment that COVID-19 can be
characterized as a pandemic on March 11, 2020. To the COVID-19 outbreak, there
is no vaccination and no treatment. The only way to control the COVID-19
outbreak is sustained physical distancing. In this work, a simple control law
was proposed to keep the infected individuals during the COVID-19 outbreak
below the desired number. The proposed control law keeps the value of infected
individuals controlled only adjusting the social distancing level. The
stability analysis of the proposed control law is done and the uncertainties in
the parameters were considered. A version of the proposed controller to daily
update was developed. This is a very simple approach to the developed control
law and can be calculated in a spreadsheet. In the end, numerical simulations
were done to show the behavior of the number of infected individuals during an
epidemic disease when the proposed control law is used to adjust the social
distancing level.
