Hong Kong health experts say people who have received China's Sinovac COVID-19 vaccine should be given booster shots of the BioNTech vaccine instead.
A panel advising the government says the Chinese vaccine offers less protection, and boosters are needed to reduce the risk of a future virus outbreak.
Richard Kimber reports from Hong Kong.
IN: Around 40%
OUT: Richard Kimber, Hong Kong
DUR: 0.51