LONDON (Reuters) - Three Ebola-infected travellers a month would be expected to get on international flights from the West African countries suffering epidemics of the deadly virus if there were no effective exit screening, scientists said on Tuesday.
The three countries, Guinea, Liberia and Sierra Leone, do all check departing air passengers for fever, although the test cannot spot sufferers in the period before they show symptoms, which can be up to 21 days.
