Vaccinations are the best way to prevent infection or reduce the seriousness if one does get affected. Vaccines are therefore administered to induce long-lasting protective immune responses
Mode of transmission: Influenza is spread by droplets generated by sneezing, coughing or by direct or indirect contact.
The incubation period: From 1-2 days before initial symptoms and up until day 5 with symptoms.
Disease burden: Influenza epidemics occur yearly. The young, elderly, pregnant women, those with co-morbid conditions, low-socioeconomic, and Maori and pacific ethnic groups have high rates.
Vaccine efficacy/ effectiveness This depends on the type of influenza strain, the age of the individual, and if the individual has underlying medical conditions.