Fig. 4.

Numbers of (a) infections and (b) cumulative deaths in London with universal testing, facemask use and contact tracing from the 8^th May under lockdown. We compared the scenario of a prolonged lock-down with no additional control interventions (solid line), to the prolonged lock-down with weekly universal testing of the whole population (dotted line (:)), to the addition of facemask usage by isolated positive cases and face coverings by the general population, dotted line (-.), and the addition of tracing and isolation of contacts of positive cases (dotted line (-*). a. Infections b. Cumulative deaths