Are flu vaccines dangerous?

The flu vaccine is potentially dangerous to children under 6 months of age and people with severe allergies to chicken eggs. It is also potentially dangerous to those with compromised immune systems, according to the Centers for Disease Control and Prevention.

Recombinant vaccines made without the actual flu virus or chicken eggs are available for those 18 years and older who have egg allergies, according to the Centers for Disease Control and Prevention. Chronic conditions such as asthma and diseases of the heart, lung, liver or kidneys require the discretion of a physician before receiving a flu vaccination, as there is a high risk of complications afterwards.