Figure - PMC

Skip to main content

An official website of the United States government

Here's how you know

Here's how you know

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

View full-text article in PMC

. 2021 May 15;787:147483. doi: 10.1016/j.scitotenv.2021.147483

Search in PMC
Search in PubMed
View in NLM Catalog
Add to search

© 2021 The Authors

Since January 2020 Elsevier has created a COVID-19 resource centre with free information in English and Mandarin on the novel coronavirus COVID-19. The COVID-19 resource centre is hosted on Elsevier Connect, the company's public news and information website. Elsevier hereby grants permission to make all its COVID-19-related research that is available on the COVID-19 resource centre - including this research content - immediately available in PubMed Central and other publicly funded repositories, such as the WHO COVID database with rights for unrestricted research re-use and analyses in any form or by any means with acknowledgement of the original source. These permissions are granted for free by Elsevier for as long as the COVID-19 resource centre remains active.

PMC Copyright notice

Fig. 2 — Case cluster characteristics over time.

The mean and confidence intervals of the number of cases within clusters (A) and the duration of clusters (B) are calculated for significant (red line) and non-significant clusters (grey line). Between May 6 and June 15, the prospective space-time scan statistic detected no significant clusters. The vertical dashed lines delimit the Swiss lockdown period (March 16 to April 27). (For interpretation of the references to color in this figure legend, the reader is referred to the web version of this article.)