_____________________________________________________________________________________________________ *Corresponding author: E-mail: amaro4baya@yahoo.com, padre4baya@gmail.com, amarobaya@yahoo.com; Journal of Scientific Research & Reports 26(6): 110-119, 2020; Article no.JSRR.59393 ISSN: 2320-0227 The Impact of the Lockdown Measure on the Confirmed Cases of the Novel Coronavirus (COVID-19) in Nigeria Charles Okechukwu Aronu 1* , Nkechi Udochukwu Otty 2 , Jacob Chinedum Ehiwario 3 and Patrick Nnaemeka Okafor 4 1 Department of Statistics, Chukwuemeka Odumegwu Ojukwu University, Anambra State, Nigeria. 2 Department of Environmental Health Sciences, School of Health Technology, Federal University of Technology Owerri, Imo State, Nigeria. 3 Department of Mathematics, College of Education, Agbor, Delta State, Nigeria. 4 Department of Mathematics/Statistics, Institute of Ecumenical Education, Enugu State University of Science and Technology (ESUT), Onitsha Study Centre, Nigeria. Authors’ contributions This work was carried out in collaboration among all authors. Author COA designed the study, and performed the statistical analysis. Author NUO wrote the introduction. Authors JCE and PNO managed the literature searches. All authors read and approved the final manuscript. Article Information DOI: 10.9734/JSRR/2020/v26i630276 Editor(s): (1) Dr. Tzasna Hernandez Delgado, National Autonomous University of Mexico, Mexico. (2) Dr. Karl Kingsley, University of Nevada, United States of America. Reviewers: (1) S. Prasath, Nandha Arts and Science College, India. (2) Gabriele Galli, University of Michigan, United States of America. Complete Peer review History: http://www.sdiarticle4.com/review-history/59393 Received 10 July 2020 Accepted 23 July 2020 Published 05 August 2020 ABSTRACT Aims: This study examined the impact of the lockdown measure on the confirmed cases of the Novel Coronavirus (COVID-19) in Nigeria. The objectives of the study include to identifying an appropriate autoregressive integrated moving average (ARIMA) model that is adequate for estimating the reported cases of COVID-19 in Nigeria and to ascertain whether the ease of lockdown has a significant impact on the reported cases of COVID-19 in Nigeria. Place and Duration of Study: The source of the data used for this study was the secondary data obtained from the daily report of the United Nations Office for the Coordination of Humanitarian Affairs (OCHA) from 1 st February 2020 to 30 th June 2020. Original Research Article