摘要
On May 20,2021,75-year-old female(Case A)went to a local hospital due to pharyngeal pain and low-grade fever in Liwan District,Guangzhou City,Guangdong Province.The oropharyngeal swab from Case A tested preliminarily positive for severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)/coronavirus disease 2019(COVID-19)virus using a quantitative real-time reverse transcription polymerase chain reaction(RT-qPCR)method after a hospital visit.