According tothe CDC, it takes less than a minute for E. coli to be inactivated if chlorine levels are adequate, about 16 minutes to control Hepatitis A virus, about 45 minutes tokill off the Giardia parasite and over 10 days for a Crypto parasite.
The campaign has mostly steered clear of reminding people that Mr Obama's pastor of two decades thinks the American government created the AIDS virustokill blacks, but Mrs Palin has hinted that she thinks this is fair game.
All influenza vaccines are made by growing influenza virus particles in chicken eggs before treating them in a way tokill (inactivate) or weaken the viruses.