The conclusion of the text is that “global travel helps to immunise the population”.
1 – Correct
According to the conclusion, global travel helps to immunise the population. However, since majority of the British residents are not global travellers, this would mean that they will not be immune to bird flu.
2 – Correct
All infectious diseases are different. So even though we may be immune to some diseases, this would not mean that we can be immune to the bird flu as well.
3 – Correct
Good nutrition is dependent on other factors as well such as environment, pollution etc. and not just the strength of the economy.