CHUNCHEON, SOUTH KOREA - APRIL 17: An employee holds up an AFIAS Covid-19 Ab testing kit used in diagnosing the coronavirus (COVID-19) at the Boditech Med Inc. headquarters on April 17, 2020 in Chuncheon, South Korea. South Korea has called for expanded public participation in social distancing, as the country witnesses a wave of community spread and imported infections leading to a resurgence in new cases of COVID-19. South Korea's coronavirus cases hovered around 20 for the fourth straight day, but health authorities are still staying vigilant over cluster infections, as well as new cases coming from overseas. According to the Korea Center for Disease Control and Prevention, 22 new cases were reported. The total number of infections in the nation tallies at 10,635. (Photo by Chung Sung-Jun/Getty Images)