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POPSFlu: One shot deal An attempt to find a flu shot that will protect for a lifetime is having some success. This shot <strike>will</strike> would protect not only against the annual flu but also against the pandemic flu varieties such as bird flu.
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POPSSunscreen: Health Effects Little (and disputed) evidence of negative effects of absorbed sunscreens. Might lead to feminization of bodily hormone mixture but this is not verified in other study. Don't worry about sunscreens preventing vitamin D production.