Here is something very odd I read on the CDC website (which I obtained after reading the information posted on MA's government website about this vaping ban)
According to the CDC there is not one reported cases of Lung Injury Associated with Electronic Cigarettes, or Vaping in Massachusetts.
"As of September 17, 2019 at 5pm, 530* cases of lung injury associated with the use of e-cigarette or vaping products have been reported to CDC from the following states and 1 U.S. territory: AR, CA, CO, CT, DE, FL, GA, HI, IA, ID, IL, IN, KS, KY, LA, MD, MI, MN, NC, ND, NE, NJ, NM, NV, NY, OH, OR, PA, SC, SD, TN, TX, UT, VA, WA, WI, WV, WY, and USVI. These numbers may change frequently."
https://www.cdc.gov/tobacco/basic_information/e-cigarettes/severe-lung-disease.html
Now the state website says "Potential and probable cases have been coming into the State Public Health Laboratory at an alarming rate– on average of 5-10 per day since it was made a reportable condition just a short time ago. "
I am guessing this is either a timing issue - or that this is not confirmed at this point so that the CDC would not report it as such.
https://www.mass.gov/guides/vaping-public-health-emergency