Last month, the New York State Health Department reported just five confirmed COVID-19 deaths at Brooklyn’s adult care facilities. New data released last week, however, increased that number 26 times — revealing that the virus killed at least four percent of the borough’s residents in long-term care. Out of the borough’s 21 assisted living facilities and adult homes — which provide residential services for adults with physical and mental limitations — 18 have seen residents die from COVID-19, with 131 confirmed fatalities in total. The new tally represents around four percent of all the available beds inside adult care facilities in Brooklyn — meaning that the percentage of residents who died is likely much higher, since the homes were most …