Fig 3. The evolution in time of contacts between juvenile (j), adult (a) and senior (s) susceptible individuals (columns) and infectious individuals in the late latent phase (E₃) or one of the infected phases (I₁, …H₃).

(a) In baseline scenario control measures will be maintained over time, hence contacts and transmission of the virus will remain low, whereas (b) a lift of all control measures (cautious phase-out scenario) after April 15 will slowly lead to a new increase in contacts and virus transmission.