From the Enteric Diseases Epidemiology Branch, Division of Foodborne, Waterborne, and Environmental Diseases, National Center for Emerging and Zoonotic Infectious Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia

Submitted November 10, 2021; accepted May 9, 2022

Disclosure: The authors report no conflicts of interest.

The data are available upon request. The R package called nncc is available on GitHub.

Supplemental digital content is available through direct URL citations in the HTML and PDF versions of this article (www.epidem.com).

Correspondence: Beau B. Bruce, MD, PhD, Enteric Diseases Epidemiology Branch, Division of Foodborne, Waterborne, and Environmental Diseases, National Center for Emerging and Zoonotic Infectious Diseases, Centers for Disease Control and Prevention, 1600 Clifton Road NE, MS H24-9, Atlanta, GA 30329-4018. Email: [email protected]