29 Nov 2009
The typhoid vaccine is produced by heating a strain of salmonella typhi and then adding phenol, holding and then freeze drying the vaccine. This process inactivates the salmonella typhi strain.
The heat kills the salmonella and the phenol preserves it so that it can be reconstituted and given by injection when required.
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1 answer • 3 Aug 2009
... for about five hours?
1 answer • 1 Feb 2013
... typhoid vaccine. My boyfriend needs to get the inactivated vaccine before he can visit me in Hong Kong, and he lives in California in the US. He ...
1 answer • 2 Jun 2013