Word: viral
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That virtuality translates into remarkable profit margins. eBay's gross margins last quarter were a stunning 82%. Amazon, which actually has to acquire goods and ship them out, has gross margins averaging 20%. And because so much of eBay's customer recruitment is viral--sellers attracting buyers to the site, and buyers attracting sellers--its customer-acquisition costs are just half of Amazon...
...interrupt HIV's reproductive cycle at critical points. One particularly attractive target: a molecule that could prevent HIV from inserting its genes into its host's genome. That would give doctors two new ways to block HIV, complementing existing drugs such as AZT (which keeps HIV from converting its viral genome into one that is compatible with human DNA) and protease inhibitors (which hinder HIV's final assembly before leaving the cell...
...report is far from perfect. Even though the tests were standardized, they consist basically of what investigators call "self-reports," which are more susceptible to social pressure than, say, viral-antibody counts. It's also easier to talk about being "stressed out" in today's pop-psychology culture than it was when Dwight Eisenhower was President. Yet Twenge's conclusions echo the concerns of many parents, teachers and pediatricians. "I think children are more anxious," says Dr. Thomas McInerny, professor of pediatrics at the University of Rochester. "Clinicians, pediatricians, psychologists--we're all seeing more...
...advantages in that you don't have to give the viral vector to the person....You can circumvent some of the problems that might arise due to virus," said White...
...example, one viral technique involves introducing a changed gene that can infect all cells in the body, not just targeted organs...