Vietnam is considered a success case in the fight against COVID-19, having kept infections to a minimum. But in late March, the country's biggest medical facility saw a large cluster of cases, and in an unprecedented move, Bach Mai Hospital was put into total lockdown. 700 severely ill patients and around 2,000 medical staff stayed on site, with all movement closely monitored. They tell their extraordinary stories from the 15-day lockdown of Vietnam's largest hospital.