What to do about mutant lice as kids go back to school

Mutant lice sound like the star of a low-budget horror film, but they’re a real problem being found around the nation. These insects’ mutations seem to make them resistant to someover-the-counter treatmentstypically used to get rid of lice, sold under brand names including Elimite and Nix. While some treatments are no longer effective in some…

The story behind Venus Williams’ off-court struggle

When Venus Williams takes on her sister Serena in the U.S. Open quarterfinals on Sep. 8, few will be able to tell that she’s also battling a chronic disease. In 2011, the elder Williams sister was diagnosed with Sjogren’s syndrome, an autoimmune disease that dries out the mouth and eyes, and can also sap strength and cause joint and muscle…

There’s a big catch to the HIV prevention pill some are calling ‘100% effective’

A little blue pill called Truvada could effectively prevent people from ever getting HIV — but only if they use it perfectly. A study published this week in Clinical Infectious Diseases followed 657 patients who took Truvada, a prophylactic that protects against HIV, for almost three years. The participants were HIV-negative, but at high risk of contracting the virus.…

Here’s why all fast-food signs are red

When you see that bright-red McDonald’s roof, do you get hungry? The going popular theory is that brands like McDonald’s and Burger King use the color red in their logos and around their stores because it revs up people’s appetites, making them hungry, which therefore makes them more likely to enter the store and then…