A college friend who is now a physician first introduced me to an electronic cigarette in 2008. He purchased his online from China with the hope of transitioning from smoking to vaping but found himself using both instead. A few years later, he shared a pleasant surprise -- he had succeeded in quitting both vaping and smoking. [...] Smoking has many negative effects on respiratory health, and the possibility of a relationship between smoking (both traditional cigarettes and marijuana) or vaping with Covid-19 were raised by early observations in China. [...]