JTAM (Jurnal Teori dan Aplikasi Matematika) http://journal.ummat.ac.id/index.php/jtam p-ISSN 2597-7512 | e-ISSN 2614-1175 Vol. 6, No. 4, October 2022, pp. 1047-1059 1047 COVID-19 Predictions Using Regression Growth Model in Ireland and Israel Wasim Raza 1 , Dieky Adzkiya 2 , Subchan 3 , Saba Mehmood 4 1 Departement of Mathematics, University of Sargodha, Pakistan 2,3 Department of Mathematics, Institute Teknologi Sepuluh Nophember, Surabaya, Indonesia 4 Departement of Mathematics, University of Thal Bhakkar, Pakistan wasimrazaa135@gmail.com 1 , dieky@matematika.its.ac.id 2 , subchan@matematika.its.ac.id 3 , saba.mehmoodphd22@gmail.com 4 ABSTRACT Article History: Received : 09-08-2022 Revised : 24-09-2022 Accepted : 02-10-2022 Online : 08-10-2022 The World Health Organization (WHO) asserted the recently discovered severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), also known as COVID-19, a pandemic on March 11, 2020. Since the genesis and growth mechanisms of this virus are unclear and impossible to detect, there are still many uncertainties concerning it and no vaccination or effective treatment. The main goal is to halt its global spread. This paper employed a regression growth model with an extended Weibull function on the dynamics of COVID-19 to make predictions about its spread. Our findings demonstrate the viability of using this model to forecast the spread of the virus. Using a logistic growth regression model, the note tabulates the COVID-19-related final epidemic sizes for a few sites, including Ireland and Israel. Keywords: COVID-19; Regression growth model; Weibull function; Forecasting. https://doi.org/10.31764/jtam.v6i4.10944 This is an open access article under the CC–BY-SA license ——————————  —————————— A. INTRODUCTION There is no specific medication or vaccination approved by the medical community to treat or prevent the novel coronavirus SARS-CoV-2 that causes COVID-19. This disease, which is spread through inhalation or contact with contaminated droplets or fomites, has a retention duration of one to two weeks (Singhal, 2020). Even though the case fatality rate is estimated to range from 2 to 3% (Yang et al., 2020), the disease can be fatal to older people (about 20% for age groups of 50+) and those with an underlying comorbid condition. The first quick growth is a representation of the cases between January 22 and the end of January, highlighting the growing case load in China. The pinnacle that developed at the end of January and February 10 illustrates how effective China's strict lockdown, which was put in place to halt the spread. During this time, there were very few officially recognized cases anywhere else in the world. The gradual global spread of COVID-19 cases is correlated with the slow exponential rise that occurred from the middle of February until March 10. At the moment, South Korea, Iran,