ABSTRACT
A woman in her 80s was being treated for dementia. She lived in a four-generation household of 8 people. Her grandchild contracted COVID-19 and was admitted in another hospital. The 7 other family members were close contacts of the grandchild, and all of them except the woman with dementia developed COVID-19 within 3 days of onset in the grandchild. The woman’s PCR test for SARS-CoV-2 was negative. Her family thought that she could not live alone, but she was denied admission to other hospitals. Finally, she was admitted to our COVID-19 ward with her other family members at the family's request. After admission, she stayed in a room with family members, and COVID-19 treatment for her family and her care were performed with strict infection control measures in place. On hospital day 11, she and 5 family members had negative PCR test results for SARS-COV-2 and were discharged. With the growing number of dementia patients in Japan's aging society, there is the possibility that similar situations will occur increasingly often. This case suggests that recommended infection control measures are effective for preventing the spread of COVID-19 to people staying in the same room.