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Covid‑19 origin and transmission to humans. Covid‑19 infection began in Wuhan (Hubei, China) in December, 2019. Although to date it is considered that Covid‑19 originates from bats (96.2% overall genome sequence identity) (1), the type of intermediate animals that caused the transmission to humans remains unknown (2-4). Zhou et al (1) mentioned that 'Direct contact with intermediate host animals or consumption of wild animals was suspected to be the main route of SARS‑CoV‑2 transmission. However, the source(s) and transmission routine(s) of SARS‑CoV