South Korea has added 397 new coronavirus cases, counting its tenth straight day of triple-digit increases as the speed of viral spread nears the levels the country saw during the worst of its outbreak in spring.

The resurgence, which began in the densely populated capital area before spreading to practically every major city and provincial town over the past week, is a major setback for the country that had been eager to tout its hard-won gains against the virus.

According to AP, the daily jump in infections marked the third-consecutive day of over 300 and the highest since the 483 cases reported on March 7, when the country was dealing with a spike of transmissions in its southeastern region.