Pretty obvious to me.

I also blame the elderly family members who could and should demand they protect their family members...from covid-19...all heathcare workers must get vaccinated...it is what can protect their innocent patients...

nationwide.
Most of the deaths of nursing home residents were caused by staff bringing it into the facility.

Remember that nursing home staffs are low-paid, for the most part.
Usually not well-educated, and often not particularly interested in patient care.

I'm attuned to this as a family member of a long-term care resident.
The Covid experience has been especially hard on these residents/patients who have spent much time under quarantine.
Every time a staff member turned up with Covid, the facility was closed down, and this went on for months on end