Yes, and it is a good idea, since you can get different types of the flu, the seasonal flu shot in the US gives you protection from three different types of flu each flu season that have been...
They get samples from patients from labs and in the US from the Centers for Disease Control and Prevention (CDC) and then once it is decided exactly which strain of a particular flu will be best...
Yes, and, since the seasonal flu vaccination in the US contains the vaccine for three different types of flu, you should get that to be sure you are covered for the main types expected to be...
If you actually get the flu, and not just a mild reaction to the vaccine (which can seem similar at first), it will most likely be because you: had it already before you got the vaccine and just had...