Diamond Princess cruise ship offers a model to study the epidemic risk and effectiveness of public health measures in a restricted area with fixed population density. The cruise ship conditions clearly amplified the highly transmissible disease before countermeasures were instituted.
Rocklöv J, Sjödin H, Wilder-Smith A. COVID-19 outbreak on the Diamond Princess cruise ship: estimating the epidemic potential and effectiveness of public health countermeasures. J Travel Med. 2020 Feb 28. pii: taaa030. doi: 10.1093/jtm/taaa030.Epidemiology-Diamond Princess Cruise Ship