Gultom, D. M., Hasibuan, E. E., Sari, E. and Batubara, F. L. E. (2022) “The Relationship between Knowledge and Attitude of the Elderly in Handwashing as an Effort to Prevent Covid-19 ”, International Journal of Public Health Excellence (IJPHE), 1(1), pp. 56–59. doi: 10.55299/ijphe.v1i1.13.