Most of the patients at a prolonged stage of COVID-19 (75.0%) had received at least 2 doses of COVID-19 vaccine (83.36%).
Đa số bệnh nhân khám ở giai đoạn COVID-19 kéo dài (75,0%), đã tiêm ít nhất 2 mũi vắc xin phòng COVID-19 (83,36%).