Hundreds of scientific studies have been done on Covid-19 in such homes. These studies note that the phenomenon was experienced here and in Europe. The first question that come to my mind is, "If you wanted to do a wholesale dispersal of this population, where would you send them?"
Nursing home staff learn methods of observing and reporting changes in patients' status, to control infections. As it happened, Covid-19 did not display such changes as noted in this study:
"Asymptomatic transmission was paramount to the dissemination and mortality of COVID-19. Unsuspectedly, many nursing homes were found to have widespread dissemination levels due to a combination of atypical symptoms shown by residents and no symptoms shown by staff." A study in Spain showed that 69.7% of residents and 55.8% of staff had asymptomatic COVID-19 infection.
How were people supposed to diagnose a problem that showed no symptoms? By the way, when the Biden Administration's vaccination program got into full swing, infection and death rates in this population practically disappeared. That wasn't given widespread coverage in the media, either.