Those living in nursing homes or other long-term care facilities are the people most susceptible to infectious diseases. So, it is no surprise that nursing home residents make up a huge part of the U.S.'s COVID-19 deaths. At the end of April 2020, COVID-19 deaths in nursing home reached nearly 12,000. According to The Washington Post, almost 1 out of 10 U.S. nursing homes has COVID-19 cases.

There are clear reasons for the high number of COVID-19 deaths in nursing homes and other long-term care settings like assisted-living facilities, group homes and rehabilitation and psychiatric centers. The residents often have poor overall health and weakened immune systems and they live in close quarters. Moreover, such facilities have frequent visitors and shared staff, both of which can introduce pathogens.

Source: https://articles.mercola.com/sites/articles/archive/2020/05/07/nursing-homes-covid-19-risks.aspx