The vaccine administered in Hong Kong was produced by Sinovac Biotech, which has been widely used across the world. The first one million doses arrived in Hong Kong on Feb. 19, the earliest vaccine delivered here.

The Hong Kong Special Administrative Region government has altogether procured 22.5 million doses of vaccine from three different producers for its free inoculation program expected to cover the entire population. One million doses of the Fosun Pharma/BioNTech vaccine are expected to be shipped to Hong Kong soon.

"The vaccination process is short and I don't feel uncomfortable," said a resident surnamed Cheung, who was also given the priority as a cross-border truck driver. The man will receive the second shot 28 days later.