Good lord. There, I edited it. {Moderated} will probably argue against that, also.
Again, I believe you probably just misspoke.
There's a huge difference in saying e liquid "causes asthma", rather than saying "e liquid can trigger an asthma attack", especially when quoting a medical professional.
E liquid doesn't "cause asthma".
There isn't a shred of evidence even suggesting such.
However, it COULD trigger an asthma attack.