I am a long in the tooth social care worker and broke when I saw this story yesterday. After the initial shock I thought about how this could happen - and the answer is easily.
Countries are in lockdown, staff numbers will have been reducing daily, either due to illness or isolation, those left may well have become ill and unable to contact anyone, been paralysed by fear and fight or flight has taken over, or as I suspect, they will find some of the dead are the staff that stayed.
This is the reality of what we are facing - to those who can - PLEASE STAY AT HOME and let those of us who can't try to do our best for those who need us.