As the cluster of cases with 'pneumonia of unknown cause ' had centred around a wholesale animal and fish market , which had 1000 stalls selling chickens , pheasants , bats , marmots , venomous snakes , spotted deer and the organs of rabbits and other wild animals , it led to the suspicion that the cause may be a novel coronavirus from an animal source .
Cases with 'pneumonia of unknown cause ' started from an animal and fish market which led to the coronavirus pandemic .