How does that make sense? Isn't it better than nothing? Most insurance companies and even some stores provide them for free so it's not like we pay for them. My doctor explained that since flu viruses share a lot genetically with one another, even if a strain isn't covered by the shot that year: 1. The shot can lessen the intensity of the strain someone contracts. 2. Your immune system library is being built. So in the future, if you come in contact with any of the strains in the vaccine, your chances of contracting them are lower and the intensity if you do contract the virus will likely be lower, despite mutation. How is that a bad thing? Why are people so scared of vaccines? They are effective. 47% is effective. Flu vaccines will never be perfect. But they clearly help lower health care costs or insurance companies wouldn't ram them down people's throats the way they do. It's not like your paying $1,000.00 for a lightbulb that only works sometimes.