Despite all that has been learned and all the precautions taken, COVID-19 has continued to find its way into New Hampshire nursing homes with alarming regularity and deadly consequences.

The virus has killed 168 people just in current or recently closed outbreaks in congregate living facilities in the state, according to statistics compiled by the Health and Human Services Department. Hundreds more died in previous outbreaks.

A variety of factors may contribute to some nursing homes having a much worse experience than others, Health Commissioner Lori Shibinette said.