THE MIRROR - Vapers have been warned of the risks as chemicals in e-cigarettes enhance the chances of catching Covid, a new study found.
University of California scientists have shown that two chemicals, propylene glycol and vegetable glycerin, enhanced Covid infection through different mechanisms. And they found that adding benzoic acid, a chemical compound, to e-liquids prevents the infection caused by the chemicals.
Study first author Dr Rattapol Phandthong said: "Users who vape aerosols produced from propylene glycol/vegetable glycerin alone or e-liquids with a neutral to basic pH are more likely to be infected by the virus. Users who vape aerosols made from e-liquids with benzoic acid, an acidic pH, will have the same viral susceptibility as individuals who do not vape."