Genomic sequencing on the Melbourne man's case of COVID-19 supports the theory that the infection was acquired in an Adelaide quarantine hotel. Health officials previously stated the man in his 30s may have picked up the virus at the Playford Hotel due to another person testing positive in the adjacent room. Other theories included a "very long" incubation period. "Genomic sequencing results on this new case have been reported to the Department, and they support the hypothesis that the Victorian case acquired COVID-19 in an interstate hotel quarantine facility," a Department of Health statement read. LIVE UPDATES: There are fears hundreds of people could have been exposed to the coronavirus-infected Melbourne man on a train on Friday night.