Ridecamp: Re: [RC] WNV - vaccinated horse death

Good point, Heidi, I did not mean to imply that the vaccine was not
effective in most cases - just responding to someone's question.

Laura Hayes

Laura
Heidi wrote:
"> Don't forget that NO vaccine has a 100% efficacy rate--there are always
> those individuals who will not respond to a given vaccine by mounting an
> appropriate immune response.  In addition, those individuals may well be
> the most immunologically incompetent in a given group, and hence also more
> apt to show symptoms and succumb to the disease as well.  At this time,
> the efficacy of WNV vaccine is not entirely known--although I've seen
> various numbers over 90% thrown around from various sources.  That's not
> all that bad.  But the fact remains that there WILL be a small percentage
> of vaccinated animals that are still susceptible--doesn't mean that there
> is anything wrong with the vaccine per se, but just illustrates the
> biological reality that not all immune systems are created equal.
> Heidi"
>
>


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