We are inviting you to participate in this research study at San Diego State University because are trying to better understand how chronic usage of e-cigarettes (i.e., vaping) may influence cardiovascular health. We are inviting adults who currently vape, as well as those that have never vaped to participate. By participating in this study, you will be helping us to better understand the health effects of e-cigarettes so consumers can make informed decisions about whether to use e-cigarette products.