Seniors, especially those over 60 years old, are one of the most at-risk groups during the COVID-19 pandemic.Elderly care homes across Shanghai have been under closed-loop management since early March. Now, during the city's phased lockdown, nurses sleep at senior homes, accompanying elderly residents at all times. Parcels are carefully disinfected and delivered by staff.Qiao Yihao, deputy director of the Yangpu District Social Welfare Institution, has been staying at the senior home for 21 days with 235 of her colleagues, including medical staff and nursing workers.