In England, the more non-direct-patient care workers such as cooks and maintenance
the faster Covid-19 spread into nursing homes.

Shortages of facemasks and eyeshields also increased spread.

https://medicalxpress.com/news/2020-07-ppe-shortages-fuelled-covid-homes.html

Sample quote

The risk of COVID-19 entering a care home was just over six times higher in care homes that employed between 11 and 20 non-care workers, nearly 10 times higher in homes employing 21-30 non care workers, and almost 19 times higher in homes employing more than 30 non-care workers.

Dr. Brainard said: "We also found that once introduced into the home, the subsequent spread of COVID-19 was largely associated with inadequate access to PPE, particularly facemasks and eye protection.

End quote