Chukwuocha, U. M., J. C. Ogboeze, A. O. Bosede, U. W. Dozie, U. G. Ekeleme, V. N. Akam, and R. O. Chukwu. “Use of facemask during the COVID-19 pandemic in Southeastern Nigeria: an observational study: 10.55131/jphd/2022/200209”. Journal of Public Health and Development, vol. 20, no. 2, May 2022, pp. 110-25, doi:10.55131/jphd/2022/200209.