Figure 2.

Number of confirmed outbreak cases by country and week of onset of symptoms^a, Sweden and Denmark, 1 January–12 May 2019 (n = 57)

DK: Denmark; SE: Sweden.

^a If the week of onset was unknown, then week of faecal sample (orange outline) was used.

Black arrows indicate the week of import batches from the common producer P.4 to both Sweden and Denmark. The grey arrow indicates the week of import for batches from producer P.4 to Sweden.