International Journal of Informatics and Communication Technology (IJ-ICT) Vol.10, No.1, April 2021, pp. 19~26 ISSN: 2252-8776, DOI: 10.11591/ijict.v10i1.pp19-26  19 Journal homepage: http://ijict.iaescore.com Diagnosing MERS-CoV using dempster-shafer method Memen Akbar, Fandy Hidayat, Wenda Novayani Department of Information Technology, Politeknik Caltex Riau, Indonesia Article Info ABSTRACT Article history: Received May 27, 2019 Revised Nov 13, 2019 Accepted Jan 12, 2020 MERS-CoV (Middle East Respiratory Syndrome-Coronavirus) is a respiratory syndrome disease caused by the coronavirus which attacks the respiratory tract from mild to severe. MERS-CoV was first reported in Saudi Arabia; total cases of MERS-CoV have continued to increase. In Indonesia, the MERS-CoV enters through the pilgrimage of Hajj and Umrah. But not many people know about this disease and its symptoms. For this reason, an expert system was developed to diagnose MERS-CoV using the Dempster- Shafer method. The system can detect the disease from the symptoms inputted by user. The output of the system is the value of the probability of the disease, the level of the disease and the suggested. The levels of the disease are Stage 1, Stage 2, and Stage 3 where each has a different treatment based on the level of the disease. The system contains information about MERS-CoV in the form of videos and text. The system was built using the PHP programming language. The testing result shows that all system functionalities have been fulfilled. The expert validation testing had obtained at 76.7%, which prove that the system is good enough in diagnosing MERS- CoV and the results obtained from the questionnaire is at an average of 84.13% which is very good in helping users in diagnosing disease. The expert system that has been developed can help people in diagnosing the disease before consulting with a doctor. Keywords: Dempster-shafer Expert system Hajj and umrah MERS-CoV This is an open access article under the CC BY-SA license. Corresponding Author: Memen Akbar Department of Information Technology, Politeknik Caltex Riau Jl. Umban Sari No. 1 Rumbai, Pekanbaru – Riau 28265, Indonesia Email: memen@pcr.ac.id 1. INTRODUCTION In 2012, Middle East Respiratory Syndrome-Coronavirus (MERS-CoV) for the first time reported in Saudi Arabia. After Saudi Arabia, 27 other countries reported MERS cases in their country including Aljazair, Austria, Bahrain, China, Egypt, and another countries. From 2012 to 2018, there are 2.144 MERS- CoV cases reported included 750 death [1]. In Indonesia MERS-CoV coming from Hajj and Umrah pilgrims. In 25 August 2014 many people who went to Hajj and Umrah were infected with the virus, 136 suspects come from 20 provinces, such as West Sumatra, Riau, Jambi, West Java, DKI Jakarta, Bali, and other provinces. There are two Indonesian positively infected MERS-CoV and in the same year, one of them died. Indonesia is one of the countries that had the largest Umrah pilgrims in the world. The interest of Indonesian in going Umrah increased every year. According to the ministry of religious affair, Indonesia had the third-largest Umrah pilgrim in the world with approximately 699.6 thousand people in 2016; an increase of about 7,2 percent from the previous year [2]. From the data, the possibility of the people infected with MERS-CoV is really high, this is evidenced by the increasing number of people who went on Hajj and Umrah.