Coronavirus: more than 20,000 Hongkongers could be hidden carriers of Covid-19, study shows

More than 20,000 Hongkongers could be hidden carriers of Covid-19, new research has revealed, with scientists behind the report urging city residents to get vaccinated.

Academics from the faculty of medicine at Chinese University also revealed on Wednesday that another study showed 100 per cent positive antibody response for all participants who received either the Chinese-made Sinovac or German-produced BioNTech vaccine, with none developing serious adverse reactions.