J. Wang, K. Tang, K. Feng, and W. Lv, "High temperature and high humidity reduce the transmission of COVID-19." Available at SSRN 3551767 (2020).
 M. M. Sajadi, P. Habibzadeh, A. Vintzileos, S. Shokouhi, F. Miralles-Wilhelm and A. Amoroso, "Temperature, Humidity and Latitude Analysis to Predict Potential Spread and Seasonality for COVID-19." Rochester, NY: Social Science Research Network; 2020.
 A. Balasubramanian, "WORLD CLIMATE ZONES & GROUPS." Center for Advanced Studies in Earth Science, University of Mysore, 2013, https;//www.researchgate.net/publication/314211373
 G. Francesco Ficetola, and D. Rubolini, "Climate affects global patterns of COVID-19 early outbreak dynamics." medRxiv (2020).
 Y. Cai, T. Huang, X. Liu, and G. Xu. "The Effects of" Fangcang, Huoshenshan, and Leishenshan." Makeshift Hospitals and Temperature on the Mortality of COVID-19 (2020).
 M. Wang, , A. Jiang, L. Gong, L. Luo, W. Guo, C. Li, J. Zheng, Y. Chen, K. Zhing, H. Li, "Temperature significant change COVID-19 Transmission in 429 cities." MedRxiv (2020).
 J. Brassey, C.Heneghan, K.R.Mahtani, J. K.Aronson, “Do weather conditions influence the transmission of the coronavirus (SARS-CoV-2),” CEMB, www.cemb.net/oxford-covid-19, (2020).
 A. Notari, "Temperature dependence of COVID-19 transmission." arXiv preprint arXiv:2003.12417 (2020).
 R. Tosepu, , J. Gunawan, D. Savitri Effendy, L. Ali Imran Ahmad, H. Lestari, H. Bahar, and P. Asfian. "Correlation between weather and Covid-19 pandemic in Jakarta, Indonesia." Science of The Total Environment (2020): 138436
 B. Oliveiros, L. Caramelo, N. C. Ferreira, and F. Caramelo. "Role of temperature and humidity in the modulation of the doubling time of COVID-19 cases." medRxiv (2020).
 M. Ahmadi, A. Sharifi, S. Dorosti, S. Jafarzadeh Ghoushchi, and N. Ghanbari. "Investigation of effective climatology parameters on COVID-19 outbreak in Iran." Science of The Total Environment (2020): 138705.
 T. Carleton, and K. C. Meng. "Causal empirical estimates suggest COVID-19 transmission rates are highly seasonal." medRxiv (2020).
 D. Nevil Pinto, “Is India's Hot Weather Keeping Coronavirus at Bay? Experts Conflicted,” TWC India, the weather channel, the times of India, March,03,2020. Available; https://weather.com/en-IN/india/science/news
 K. Chiyomaru and K. Takemoto. "Global COVID-19 transmission rate is influenced by precipitation seasonality and the speed of climate temperature warming." medRxiv (2020).
 J. Liu, J. Zhou, J. Yao, X. Zhang, L.Li, X. Xu, X. He et al. "Impact of meteorological factors on the COVID-19 transmission: A multi-city study in China." Science of the Total Environment (2020): 138513.
 J. Liebig, R. Jurdak, A. El Shoghri, and D. Paini. "The current state of COVID-19 in Australia: importation and spread." Available at SSRN 3559568 (2020).
 Kurdistan Regional Government, Ministry of Health, https://gov.krd/english/government/entities/moh/.
 D. C. P. Thalen, Ecology and utilization of desert shrub rangelands in Iraq. Springer Science & Business Media, 2012.
 M. Malcolm Walker, Climate of Iraq, A Full Year Study. AFCCC/CCD-05/002, 2005.
 J. E. Oliver, ed. Encyclopedia of world climatology. Springer Science & Business Media, 2008.
 * (Koppen 1936) Climate Classification: R ≤ 2t R: Rain fall (mm) T: Temperature (C).
(M. Belda, , E. Holtanová, T. Halenka, and J. Kalvová. "Climate classification revisited: from Köppen to Trewartha." Climate research 59, no. 1 (2014): 1-13.)