Should flu vaccine be taken annually is necessary for us? who always can't predict the right strain for vaccine, we still suffer from the novel virus.

Helpful: The components of the flu vaccine are based upon predictions from strains known to be starting, usually in asia, which spread over the rest of the world. There is a certain amount of guesswork, and they are rarely exactly right, but get enough of an immunity in place to lower the risk for the population as a whole. It is best to follow the recommendations of public health officials.

Get shot annually: The flu virus changes, so it's important to get vaccinated every year. The cdc usually does a pretty good job of predicting which viruses will be circulating. Sometimes they miss, but if you don't get the shot you have no chance of being protected.