Given the highly localised and sudden/synchronised bout of illness associated with vaping, to me it immediately seemed reasonable to assume contamination of a specific batch of products rather than the act of vaping in general being an issue.
I'm not saying vaping doesn't perhaps have long term negative effects, just that the pattern of illness suggested an issue with specific products.
I'm not saying vaping doesn't perhaps have long term negative effects, just that the pattern of illness suggested an issue with specific products.