That's what I heard as well but I haven't been following it closely. My brain has been on the Depp v. Heard trial.I heard most of the cases (not all) were in children under 5, so most were not vaccinated. I have been following as I have a 15 year old grandson.
Also heard it may be related to adenovirus.
https://www.medicalnewstoday.com/ar...-in-us-and-europe-may-be-linked-to-adenovirus
I hope this is figured out quickly.