Word: occurred
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...quell the epidemic took three steps forward and one step back this year. The first human trials of a vaccine against African strains of HIV began in Kenya and England. The FDA approved a new anti-HIV drug. And leaders of developing nations, in which 95% of aids cases occur, pledged more funding to fight the economic and social devastation caused by the disease. But South African President Thabo Mbeki sounded a sour note when he openly questioned whether HIV causes aids. That prompted more than 5,000 scientists to sign a declaration decrying the waste of valuable time...
...business meeting? Unlike a more traditional advertising claim--that, say, an angel flies out of a can of cleanser to banish grime with her magic wand--this hotel's claim is not inherently or obviously metaphorical. Yet it's clearly not true--a point that probably didn't even occur to the producers of the ad or 99% of its viewers. The deception is not on purpose; few are deceived. But the process of producing a spin for this hotel chain apparently did not include reality as even a minor consideration...
Systematic errors in machine reading of ballots almost universally result in undercounting. They occur, for example, when a chad does not separate from the ballot card or when a mark on an optically scanned form is too faint. Manual counting in precincts that use machine voting thus increases the number of votes tabulated for both parties. Machines do not favor one candidate or the other, and the percentage of votes obtained by each party usually remains the same after a fair manual recount--unless extra ballots turn up. A manual recount using different standards to decide voter intention...
...microbial invaders. To initiate the immune response, the APC coughs up a molecule from the bug it has eaten, latches onto a helper T cell and "presents" it with the target molecule, instructing the T cell to prepare its troops for war. This activation is tightly controlled. It cannot occur without the lock-step interaction of a several proteins on the surface of both cells-one of which is known...
...UPDATE Sexually transmitted diseases aren't going away. Some 65 million Americans are currently infected with one or more STDs, and 15 million new infections occur each year. Most disturbing, after two decades of decline, gonorrhea incidence is up 9% since 1997. Meanwhile, 18% of women and 8% of men carry the human papilloma virus that causes half of all cervical-cancer cases. All the more reason to use a condom.--By Janice M. Horowitz...