In South Korea, an aggressive ‘trace, test and treat’ programme was put in place. Members of the public were advised to avoid large gatherings and crowded places, and to follow quarantine protocols, such as wearing a face mask, handwashing and social distancing.
Among these, wearing a face mask is considered to be one of the most effective preventive measures. According to a recent article, 63.2% of Koreans reported wearing a face mask when they are outside [3]. In another international survey,
the reported rate of wearing face masks among Koreans was even higher (94%); this was the highest rate among 28 countries