It's the advantage of the virus to spread, and you can only spread when you infect people and they infect other people without necessarily killing them. So if you had 100 percent mortality, the potential pandemic would almost self-eliminate itself.
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What the immune system of man has in its advanced development is what we call immunological memory, so that once it sees something for the first time, when it sees it the second or the third time, it can respond against it in a way that's much more accelerated than when it sees it for the first time.
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We can sharply deflect the curve of HIV incidence.
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There's more than one way to get to the goal that you want to get to, but once you compromise your own principles, then you're lost. You're really lost.
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Testing two vaccines against different H1N1s at the same time has never been done.
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You don't have to vaccinate every man, woman and child in the country if you have a couple of cases of smallpox cropping up.
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It's extremely likely that the people who have never been exposed to a human who has leprosy, it's very likely they got leprosy from exposure to an armadillo.
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It is now widely recognized that any attempt at malaria eradication must be a long-term commitment that involves multiple interventions, disciplines, strategies and organizations.
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A pandemic influenza would mean widespread infection essentially throughout every region of the world.