A $60 double-dose experimental coronavirus vaccine is being made available to some residents in an eastern Chinese city, health officials have said, the first details of a mass rollout for an as-yet unproven vaccine, according to an AFP report.

Officials in Jiaxing city said that residents aged between 18 and 59 with “urgent needs” can seek consultations at clinics for a Sinovac Biotech vaccine that authorities have been giving to groups such as medical workers.

The statement from Jiaxing's centre for disease control and prevention did not specify what constituted “urgent needs”.

Authorities did not say how many people in the city had been given the vaccine, which comes in two doses, administered up to 28 days apart and costing a total of 400 yuan ($59).