How to remove a virus
I’ve got a virus lately and it’s showing up a message every minute in my calendar and am searching for help
iPhone X, iOS 14
If running iOS 13 or earlier versions, check: Settings - Passwords & Accounts - Accounts - Any rogue entries here? If so, delete the rogue account.
If running iOS 14, check: Settings - Calendar - Accounts - Any rogue entries here? If so, delete the rogue account.
The Apple support article is below.