(SEOUL, South Korea) — South Korea on Saturday reported an eight-fold jump in viral infections in four days to 433, most of them linked to a church and a hospital in and around the nation’s fourth-largest city, where health workers scrambled to screen thousands of worshippers. The country also reported its third death from the virus, a man in his 40s who was found dead at home and posthumously tested positive. There’s concern that South Korea’s death toll could grow.