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Overviews of efforts of the Japanese Society of Echocardiography from March to June 2020. The graph shows the number of positive PCR tests per day in Japan. The numbers at the bottom of the graph represent dates, the circled numbers represent events, and their legends are shown at the bottom. ASE American Society of Echocardiography, JSE Japanese Society of Echocardiography, PCR polymerase chain reaction
