evidence: A common worry is that the flu vaccine can give you the flu. This isn’t possible. [...] It’s still possible to get the flu after vaccination. If you do get sick with the flu, your symptoms may be milder if you got the vaccination. [...] When you protect yourself from the flu through vaccination, you’re also protecting those who can’t get vaccinated from catching the flu. This includes those who are too young to get vaccinated. This is called herd immunity and is very important.