Dr. Shahnaz Qadri at Texas A&M University led a study to find out how thirdhand smoke affects blood flow. The researchers put mice on carpets that were polluted with thirdhand smoke for one month. They discovered that the mice’s blood cells stuck together more quickly, which raises the risk of blood clots. They also found that female mice were more likely to develop blood clots from thirdhand smoke than male mice. These results match other research that shows that thirdhand smoke slows down how the body heals. The study helps scientists understand the risks of thirdhand smoke.