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 Apr 15:1–7. doi: 10.1017/ice.2021.167

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

© The Society for Healthcare Epidemiology of America 2021

This article is made available via the PMC Open Access Subset for unrestricted re-use and analyses in any form or by any means subject to acknowledgement of the original source. These permissions are granted for the duration of the COVID-19 pandemic or until permissions are revoked in writing. Upon expiration of these permissions, PMC is granted a perpetual license to make this article available via PMC and Europe PMC, consistent with existing copyright protections.

PMC Copyright notice

Fig. 2. — The risk difference and 95% CI between higher and lower exposure groups during study periods 1 and 2. During period 2, healthcare workers at the highest exposure risk had an increased probability COVID-19 by seropositivity to SARS-CoV-2 antibodies.