The COVID-19 pandemic has created a number of challenges, including that many are spending more time at home than ever before. This is a significant problem for those with neighbors who smoke. Smoking continues to be a problem in multi-unit housing, and while stay-at-home orders have helped to reduce transmission of COVID-19, they have also increased exposure to secondhand smoke from neighbors.

But the problem is more than just secondhand smoke: long after secondhand smoke has cleared, the harmful chemicals in tobacco smoke and e-cigarette vapors remain as thirdhand smoke. [...]