Feb 8, 2014 11:21 PM
Tom McNamara... checking in on the ongoing debate about whether to get a flu shot... you often wonder: will it really protect me?
Vaccines have wiped out smallpox and they've nearly eradicated polio. Vaccination can control measles and mumps, and they protect travelers against yellow fever and cholera.
Most are so good that a few doses in childhood cover people for decades, even life. But there's one vaccine that people have to get every single year, and even then it's not guaranteed to fully prevent infection. It's the flu shot, and scientists are struggling to find a way to make a better one.