Having an article titled "Mysterious [XXX] illness" is pretty much the dictionary definition of FUD but even if you can't accept that, the national health organisations of UK[1] and New Zealand[2] have conducted studies about vaping, you can find a lot of data there (something that can't be said about the NYT article).

[1] https://www.gov.uk/government/news/e-cigarettes-around-95-le...

[2] https://www.health.govt.nz/our-work/preventative-health-well...