An article on Oct. 6 about the status of women in the fields of science and mathematics misstated a statistic regarding girls who are taking high-school physics. It was the percentage ofgirls among all high-school physics students of both sexes that rose to 47 percent in 1997 from 39 percent in 1987 — not the percentage of girls taking high-school physics among all high-school girls. The article also misstated the status of a woman hired by the mathematics department at Yale University for a tenure-track position in 2010. She is yet to come up for tenure. She was not denied it.
Not surprisingly—since, after all, mosquitoes bite us to harvest proteins from our blood—research shows that they find certain blood types more appetizing than others. One study found that in a controlled setting, mosquitoes landed on people with Type O blood nearly twice as often as those with Type A. People with Type B blood fell somewhere in the middle of this itchy spectrum. Additionally, based on other genes, about 85 percent of people secrete a chemical signal through their skin that indicates which blood type they have, while 15 percent do not, and mosquitoes are also more attracted to secretors than nonsecretors regardless of which type they are.