Introduction
The case fatality ratio (CFR), the ratio of deaths from an infectious disease to the number of cases, provides an assessment of virulence (Nishiura et al. 2009).
References
Nishiura, Hiroshi, Don Klinkenberg, Mick Roberts, and Johan A. P.
Heesterbeek. 2009. “Early Epidemiological Assessment of the
Virulence of Emerging Infectious Diseases: A Case Study of an Influenza
Pandemic.” Edited by Jean Peccoud. PLoS
ONE 4 (8): e6852. https://doi.org/10.1371/journal.pone.0006852.