txpljfg at UABCVSR.CVSR.UAB.EDU writes:
>> The issue is: Are we really talking about contraception here? Many
> vaccines tend to induce immunity that is relatively permanent. If this
> were the case with an immunologic vaccine, then the result would
> effectively be sterilization.
>
Actually, most vaccines are not permanent, hence the need for
booster shots. Data is just now being accumulated on the
timespan of effective protection of the recombinant Hep B
vaccine. The smallpox vaccine (still used by those of use who
work with vaccinia virus) has only recently been upgraded from
3 year booster to 10 year booster.
Mike K
