 Influenza is a common viral infection that primarily attacks the respiratory system. Though rare, it can become deadly in people with low immunity or those suffering from chronic diseases by causing pneumonia and respiratory failure. Here are 8 things you need to know about influenza and the vaccine. How does one contract influenza? Influenza is an airborne infection. It can spread from person to person via coughing, sneezing and touching infected surfaces. Is influenza the same as the common cold? No. The symptoms of influenza are more severe as compared to that of the common cold. Moreover, a common cold does not cause serious health problems whereas influenza does. How serious is influenza? Most of the time, influenza disappears within a week to 10 days. However, sometimes it can lead to serious health consequences such as infection of the heart, pneumonia and also death in high-risk individuals. Who is eligible to get the influenza vaccine? Everyone above the age of 6 months is eligible. However, it is recommended that high-risk individuals speak to their doctor about getting vaccinated. Who should avoid the vaccine? People with a known allergic reaction to the vaccine or having an ongoing infection and people with Guillain-Barre syndrome, when should one get vaccinated? It is ideally recommended to get vaccinated every year before the flu season starts. Why do I have to get the vaccine every year? The virus mutates every year so the influenza vaccine needs an update in the body to protect you from the virus. Does the vaccine have side effects? Mild side effects are seen with the influenza vaccine, which includes mild pain, tenderness, fever and swelling at the site of injection. Since influenza is potentially fatal, the benefits clearly outweigh the risks.