Childhood flu vaccine campaign
This campaign sub-site aims to give the public and GPs information on this season's new Perth Metro pediatric influenza vaccine.

Ordering publications
Ordering fact sheets or brochures

Planning healthy communities
Health care topics for the Community

Immunisation
Immunisation - General Information

Pandemic influenza
Annual human influenza epidemics occur because the influenza viruses change their antigenic structure ('antigenic drift') to produce new strains that can cause infection in persons who have been previously infected or vaccinated with different strains. The influenza viruses are also capable of major changes to their antigenic structure ('antigenic shift') to produce new strains that can potentially infect any person. Pandemics, or world-wide epidemics, occur when antigenic shift causes the sudden and unpredictable emergence of a new human influenza virus to which most of the population is susceptible.