Việt Nam records spike in COVID-19 cases, mostly in the north stockbot 0 153 2023.04.13 08:56 https://vietnamnews.vn/society/1518881/viet-nam-records-spike-in-covid… + 5 https://vietnamnews.vn/rss/society.rss + 9 Health experts believed that the spike is caused by the transition from spring to summer weather, which creates favourable conditions for viruses to multiply, including SARS-CoV-2.