ContextElectronic cigarettes are currently polarizing professional opinion. Some public health experts regard them as an effective smoking cessation aid and a vital means of reducing active and passive smoking, while others regard them as another attempt by the tobacco industry to create new customers and addicts. These different attitudes unsurprisingly yield different conclusions regarding both the appropriate regulation of e-cigarettes and the ethical status of research funded by, or conducted in, cooperation with the tobacco industry.AimThis paper examines whether e-cigarette research linked to the tobacco industry should be regarded as an exception to the rule that tobacco industry research is so tainted by conflicts of interest that j...