Everyone hates getting the flu and the best way to defend yourself from it is by getting your flu shot. But the shot is sometimes not always effective in some. What scientist do is they take a educated guess at what type of flu they have to make a vaccine for next winter. To make all the shots before winter rolls around, they will start making shots in the early summer. This is not the most effective way, but is really the only. This is were the universal vaccine comes in. The vaccine would be able to fight off every type of flu. The product is still in the works, but is predicted to hit the market as little as 5 year.