Everyone is hungup on the incubation period and not how the disease progresses. Ignor the 2 -21 day incubation period and concentrate on the disease progression chart. Vomiting starts around day 10. That would mean not only was he in contact with many more people then 18, 80 or whatever, he may have been well aware of his illness before he reached the country. He knew he was in close contact with it. And if you count back 10 days from the onset of vomiting you would have somewhere around September 18th. Am I the only one who sees this??
That is including the incubation period. That is a typical after becoming infected. It is not day ten after incubation.