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Biotech / Medical : SARS and Avian Flu -- Ignore unavailable to you. Want to Upgrade?

To: Maurice Winn who wrote (269)	4/22/2003 5:43:15 PM
From: Biomaven	Read Replies (1) \| Respond to of 4232

There are two types of polio vaccines - a weakened live virus that you could take orally and a killed virus (like Salk first developed) that was injected. Speaking broadly, I believe that the live virus vaccines are more effective, but the killed ones have fewer safety concerns. I believe there were actually some polio cases caused by an early live virus vaccine. (And there is at least a theoretical concern that someone inoculated with the new nasal flu vaccine could infect someone else with a weakened immune system.) Killed virus vaccines are apparently quicker and easier to make. That would likely be the route for any SARS vaccine. Note that there is now also an alternative form of vaccine where you attempt to immunize only against some particular protein on the virus surface. The recently failed HIV vaccine was like that. Peter