I enjoyed this more than I thought I would, party because of Han Hyo Joo and Park Hyung Sik. They both play likeable and relatable characters whose friendship to lovers story is natural, despite the unnatural setting of the story. I've always enjoyed Han Hyo Joo's dramas. Park Hyung Sik is more hit and miss for me but this one is a hit for me. The drama raises interesting questions about how a government might respond to a frightening and highly contagious epidemic, how infected people are treated not just by the government but also by each other, and what people might do to fight for survival. It can be ugly -- people can behave pretty badly when they're frightened -- but this drama shows that people can also be surprisingly generous and self-sacrificing. I suspect that the inspiration for this drama comes from the first major COVID epidemic before vaccines were developed and the world was terrified.