Did you actually read that article? Their own summary just says that more research needs to be done because it may pose health risks and their anecdotal evidence was an elderly man who already had coronary artery disease taking a dosage of 90mg which is an extremely large dose
anything people do poses some risk but vapes are way, way safer than smoking, drinking alcohol, or even driving a car
edibles are safer than breathing city air
yeah its a bit outdated. current articles suggest its more dangerous to vape than anyone presumed, because it causes SEVERE lung illness