SEOUL, South Korea — South Korean officials are urging people to remain at home if possible and cancel gatherings large and small as around half a million students prepared for a crucial national college exam.

Vice Education Minister Park Baeg-beom says the 490,000 applicants so far include 35 virus carriers who will take exams Thursday at hospitals or treatment shelters. Education authorities have also prepared separate venues for some 400 applicants currently under self-quarantine.

Applicants will be required to wear masks and maintain distance from each other.

Park Yu-mi, an anti-virus official in Seoul, pleaded with people to cancel all gatherings of more than 10, and for companies to half at least one-third of their employees work from home to ensure a safe environment for Thursday’s examination.

The country on Wednesday reported 511 new infections, continuing a weekslong resurgence centered around the greater capital area that brought the national caseload to 35,163, including 526 deaths.