It's also worth noting that vaccines are not 100% effective. You can get vaccinated, but still get the disease. I read that one of the hep vaccines was around 90% effective and that was considered high. I also read that there is an HIV vaccine in testing, but is is only around 40% effective (although nothing is concrete yet). The number is too low to allow it to be used.
It is important that people know how effective it is. It is conceivable that large populations get vaccinated and the false sense of security does more harm than good. The H1N1 program was well underway before we knew how effective it would be. That seemed pretty irresponsible to vaccinate more than just the most prone people.
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"A pessimist thinks things can't get any worse. An optimist knows they can."
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