I've been following this for months and New York State seems to be reporting the most accurate information.

https://www.health.ny.gov/press/releases/2019/2019-09-05_vap...

https://www.flickr.com/photos/nysdoh/sets/72157710703391248/

The sickness is suspected to be caused by blackmarket THC vape cartridges which have been cut with Vitamin E Acetate.

There is a huge problem with black market / counterfeit THC vape products.

There are two communities tracking this on Reddit:

https://www.reddit.com/r/fakecartridges/

https://www.reddit.com/r/cleancarts/