Vaccination: The Best Return on Investment
by Vaclav Smil from IEEE Spectrum on (#2V6BJ)
How good is the return? Try 44-fold-yep, that's 4,400 percent
How good is the return? Try 44-fold-yep, that's 4,400 percent
How good is the return? Try 44-fold-yep, that's 4,400 percent
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