Hong Kong’s vulnerable groups should get vaccinated against Covid-19 infections once a year as new outbreaks will occur every six to nine months, a medical expert has urged.
David Hui Shu-cheong, a professor of respiratory medicine at the Chinese University of Hong Kong, made the appeal on Saturday while pointing out that the current wave of Covid-19 infections had been declining since late last month and could end in July or August.
“The current outbreak started in April, peaked at the end of…
