The three last‐mentioned viruses are extremely dangerous because of their rapid transmission between humans. SARS‐CoV‐1, which emerged in 2002, affected 8096 in 32 countries, 774 of whom died (fatality rate 10%–15%). 8  MERS‐CoV, which appeared in 2012, affected a total of 1841 individuals, 652 of whom died with the mortality rate of ~35% worldwide. 9