Vaping substantially less harmful than smoking, largest review of its kind finds King's College London No, vapes aren't 95% less harmful than cigarettes. Here's how this decade old myth took off. The Big Smoke Some reports state that these new, flavored smoking devices are less harmful than tobacco cigarettes but how safe is vaping? In this third part of a four part series, China Daily examines the Scientific evidence proves vapes are less harmful than cigarettes 24SHARE