<human>: I've heard that the swine flu vaccine isn't very effective. Is this true?
<bot>: The swine flu vaccine is not very effective at preventing infection with H1N1 influenza virus, but it can reduce symptoms and severity of illness if you are infected. It is also important to note that most people who get the seasonal flu shot will still need a separate vaccination against H1N1 in order to receive protection from both viruses.