The immediate hypothesis was that this was a novel coronavirus from an animal source ( a zoonosis ) .Following a publication in The Lancet on 24 January 2020 , of the first 41 admissions with laboratory confirmed 2019-nCoV , the significance of the market lessened .
An individual who had never been to the market considered as the source of 2019-nCoV started showing the first symptoms on 1 December 2019 .