Vietnam says every city, province now at risk of virus infection By Phuong Nguyen and Khanh Vu   A man and his children, all wearing protective masks, ride a bicycle on a street during the coronavirus disease (COVID-19) outbreak, in Hanoi, Vietnam July 27, 2020. REUTERS/Kham   HANOI (Reuters) - Vietnam, virus-free for months, was bracing for another wave of COVID-19 infections on Wednesday after state media reported new cases in Hanoi, Ho Chi Minh City and the Centr