  We consider a Spatial Markov Chain model for the spread of viruses. The model
is based on the principle to represent a graph connecting nodes, which
represent humans. The vertices between the nodes represent relations between
humans. In this way, a graph is connected in which the likelihood of infectious
spread from person to person is determined by the intensity of interpersonal
contact. Infectious transfer is determined by chance. The model is extended to
incorporate various lockdown scenarios.
