Fig. 3.

Global distribution based on the epidemiologic data of coronavirus: a Number of incidences observed globally for SARS-CoV and MERS-CoV outbreak, and b Number of incidences observed globally for SARS-CoV-2 outbreak until April 2020 (https://www.who.int/csr/sars/country/table2004_04_21/en/; https://www.who.int/csr/disease/coronavirus_infections/risk-assessment-august-2018.pdf; https://www.who.int/docs/default-source/coronaviruse/situation-reports/20200420-sitrep-91-covid-19.pdf?sfvrsn=fcf0670b_4)