Originally Posted by
docbert
The form has 11 questions. If they were to add reasons for each question it would be significantly larger, take longer to fill in, and potentially make people less likely to answer accurately ("Yellow fever? Oops, I forgot to have that injection - I'll just answer No!")
But the purpose of the other questions is not hard for a person of normal intelligence to discern, whereas the purpose of the one about Africa, South America and the Caribbean is by no means obvious.