Interdependent cultures around the world have generally controlled COVID-19 better. We tested this pattern in China based on the rice theory, which argues that historically rice-farming regions of China are more interdependent than wheat-farming areas. Unlike earlier findings, rice-farming areas suffered more COVID-19 cases in the early days of the outbreak. We suspected this happened because the outbreak fell on Chinese New Year, and people in rice areas felt more pressure to visit family and friends. We found historical evidence that people in rice areas visit more family and friends for Chinese New Year than people in wheat areas. In 2020, rice areas also saw more New Year travel. Regional differences in social visits were correlated with COVID-19 spread. These results reveal an exception to the general idea that interdependent culture helps cultures contain COVID-19. When relational duties conflict with public health, interdependence can lead to more spread of disease.
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