Samuel Kwok, the medical director of the clinic at Kwun Chung Sports Centre in Jordan, said all 200 walk-in slots were filled on Wednesday, after the government dropped the eligible age from 70 to 60.
Speaking on RTHK’s Hong Kong Today programme, he said this could offset a slight fall in the number of vaccine bookings in recent days.
“In our centre, our regular bookings have been coming down a little bit since last week,” Kwok told RTHK’s Janice Wong.
“The decrease number is about 10, 20 percent and in face if we have these walk-ins, and we use more of these walk-ins, it can actually make up this decrease in numbers and we can manage all these people.”
Asked why the drop-in vaccines had proved so popular, Kwok said many older people were not comfortable in using computers to make a booking.
Queues formed outside many of the 24 centres offering walk-in vaccines on Wednesday, the first day people aged 60 to 69 were allowed to use the scheme.
Some 4,600 walk-in places are available between the centres every day.
A total of about 65,000 people received vaccinations on Wednesday.