Can I get the Health app *not* to sync?

My wife and I share use of an AppleID (primarily to share 15K+ photos on paid-for iCloud storage!)

With this, as it happens, the Health app on her iPhone shows the information I have entered for nyself iPhone. (First come, first served, as it were.) It would be very nice were she able to have a copy of her *own* health information in the Health app.

Is it possible to force the Health app *not* to sync?