The news comes after Hong Kong Rugby Union chief executive Robbie McRobbie last month issued a statement saying the sevens event would proceed as planned.
"There are no plans to cancel the Hong Kong Sevens," McRobbie said at the time.
"We are in regular contact with World Rugby and are keeping them updated with the situation on the ground here. There have been no conversations about changing dates or venue."
The coronavirus has also forced the cancellation of the Hong Kong marathon while the local Premier League football has been on hold since last month.
The coronavirus outbreak also leaves potential doubts surrounding the Sunwolves' scheduled Super Rugby fixture against the Jaguares in Singapore on May 2.
Latest reports show China has 44,653 coronavirus cases and 1,113 confirmed deaths.
Hong Kong has 50 cases and one death; Singapore 50 cases.