"Number of passengers who reported being ill during the voyage out of total number of passengers onboard: 99 of 1,727 (5.73%)
Number of crew who reported being ill during the voyage out of total number of crew onboard: 32 of 1,089 (2.94%)
Predominant symptoms: vomiting and diarrhea
Causative agents: norovirus"
https://www.cdc.gov/nceh/vsp/surv/outbreak/2023/Grand-Princess_4-18.html