Flu is a condition wherein the virus attacks the lungs, throat, and nose. Its symptoms include fever, chills, muscle aches, congestion, cough, runny nose, and the like. While flu may sound quite like common cold, there are a few differences to be noted between the two. One major difference being there is no vaccine for common cold, but taking a flu shot is definitely an option. However, it is important to be aware about certain myths about flu shots, and who should really take one.