This study will assess product use behaviors, biomarkers of exposure, subjective effects and safety of an electronic nicotine delivery system (ENDS) as compared to smoking your usual brand of cigarettes over 8-weeks.
The purpose of this study is to look at a drug called cytisinicline to see how effective it is at enabling people to quit smoking as compared to a placebo.
The purpose of this study is to assess the safety and effectiveness of 3 doses of the investigational drug as compared to a placebo.
The purpose of this study is to evaluate the safety and immunogenicity of an investigational live-attenuated Chikungunya vaccine verses a placebo.
