Influenza Vaccine and The Frequency of Acute Respiratory Tract Infection of West Java’s Pilgrims- Indonesia: Is there any Correlations Between? (An Analysis of Siskohatkes Indonesian Hajj Data 2018). (2020). Indian Journal of Public Health Research & Development, 11(3), 1054-1060. https://doi.org/10.37506/ijphrd.v11i3.1531