Signs and symptoms
2 Virology
2.1 Types of virus
2.2 Structure, properties, and subtype nomenclature
2.3 Replication
3 Mechanism
3.1 Transmission
3.2 Pathophysiology
4 Prevention
4.1 Vaccination
4.2 Infection control
5 Treatment
5.1 Antivirals
6 Prognosis
7 Epidemiology
7.1 Seasonal variations
7.2 Epidemic and pandemic spread
8 History
8.1 Etymology
8.2 Pandemics
9 Society and culture
10 Research
11 Other animals
11.1 Bird flu
11.2 Swine flu
12 References
13 Further reading
14 External links