It isn`t expected at all to have anything about Swine Flu in the exams, because the virus only appeared in February and didn`t get any atttention until April 13th when Mexico officially informed the WHO (World Health Organisation) about the outbreak. Exams were set long before the outbreak of the disease.
It is caused by a virus called H1N1 and has already spread in more than 50 countries causing infection to more than 12000 cases.
This is enough for the students to know. For further information you can log on this link:
http://en.wikipedia.org/wiki/Swine_flu
Best Regards!