A citizen takes a picture of the famous city sculpture "Three Smiths" which has been put on facial masks, in Helsinki, Finland, March 31, 2020. As of Monday, the coronavirus cases in Finland stood at 1,313 with 13 deaths, according to the Finnish Institute for Health and Welfare (THL). (Photos: Xinhua)

Photo taken on March 31 shows the Helsinki Cathedral in Helsinki, Finland. As of Monday, the coronavirus cases in Finland stood at 1,313 with 13 deaths, according to the Finnish Institute for Health and Welfare (THL).

A citizen stops at the famous city sculpture "Three Smiths" which has been put on facial masks, in Helsinki, Finland, March 31, 2020. As of Monday, the coronavirus cases in Finland stood at 1,313 with 13 deaths, according to the Finnish Institute for Health and Welfare (THL).

Photo taken on March 31, 2020 shows the Market Square in Helsinki, Finland. As of Monday, the coronavirus cases in Finland stood at 1,313 with 13 deaths, according to the Finnish Institute for Health and Welfare (THL).

Photo taken on March 31, 2020 shows a street in Helsinki, Finland. As of Monday, the coronavirus cases in Finland stood at 1,313 with 13 deaths, according to the Finnish Institute for Health and Welfare (THL).