Vaccines

[Ian A. York]

In article <4iov24$m7s at newsbf02.news.aol.com>,
JRicklefs <jricklefs at aol.com> wrote:
>How are vaccine's made?  I know some of them can be made by a weakened
>virus that is infected into a person then that person survives the
>weakened virus then is immune, but this doesn't work with all viruses why?

There are a couple of pieces at
<http://www.panix.com/~iayork/Immunology/vaccination.shtml>
and
<http://www.panix.com/~iayork/smallpox.shtml>
that make a start at answering your questions.

Ian
-- 
      Ian York   (iayork at panix.com)  <http://www.panix.com/~iayork/>
      "-but as he was a York, I am rather inclined to suppose him a
       very respectable Man." -Jane Austen, The History of England