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While the IQOS may reduce risk compared to smoked tobacco, the only data available has been published by Philip Morris International itself

So are they morally equivalent to British American Tobacco

A., Rodrguez, J

Similarly, you need to take in excess for such adverse effects to be present

"These chemicals are produced when e-liquids are heated to produce e-vapour and studies on mice have shown that e-vapour increases the risk of them being infected by influenza virus, so we wanted to see how it affected TB infection," explains Pablo Rodrguez, of the Innovation in Respiratory Infections and Tuberculosis Diagnosis Group