At a vaccination site in Thach An district, Cao Bang province. (Photo: VNA)Cao Bang (VNA) - The northern border province of Cao Bang on November 5 recorded its first-ever COVID-19 case which was detected in Na Sai village in Yen Tho commune of Bao Lam district. The patient is a 20-year-old man returning from the northern province of Bac Ninh on October 31. He worked for a buffet restaurant in Nam Son district, Bac Ninh province. On November 3, he received a call from the restaurant's manager who said he had close contact with a COVID-19-infected employee there.
