human
I've heard that the swine flu vaccine isn't very effective. Is this true?
assistant
It is true that the H1N1 influenza vaccine has had a lower than expected efficacy rate in some studies, but it's important to remember that vaccines are not 100% effective and can still provide protection against disease. In addition, there have been several recent reports of improved effectiveness rates for the H1N1 vaccine as more people get vaccinated.