1. Original data for generating the tables 1 and 2, figure 2 of the main text is provided in an excel file titled "PayItForwardFlu_OriginalData_16Mar2021". 
2. Codes and outputs for main findings are provided in an excel file titled "MainPaperTables1&2CodesOutputs".
3. An excel file that was used to generate figure 2 was provided titled "CopyofFigure2DataOutput".
