Note that this number might be kinda deceptive both ways. Because they were forced to stay on the ship abnormally long under quarantine.
There's a paper that estimates that if they were allowed to leave the ship right away (on Feb 3rd) 2% would have been infected, and if they were not taking special measures (isolation, etc) but on the ship for a similar amount of time (until Feb 19) that 80% of the passengers would have been infected:
There's a paper that estimates that if they were allowed to leave the ship right away (on Feb 3rd) 2% would have been infected, and if they were not taking special measures (isolation, etc) but on the ship for a similar amount of time (until Feb 19) that 80% of the passengers would have been infected:
https://academic.oup.com/jtm/advance-article/doi/10.1093/jtm...