Fig. 1.

Cumulative numbers of positively tested cases normalized to the last day (8 May 2020). Countries, even though many followed radically different strategies in response to the pandemic, seem to belong to one of three groups: (A) countries with a remarkably extended linear increase of the cumulated number of positively tested cases, including the United States, the United Kingdom, and Sweden, and (B) countries with an extended linear increase that tends to level off and enter a regime with a smaller slope. B, Inset shows an extended regime after the peak (cases per population size).