Hong Kong is approaching the winter flu season, but vaccination rates among most age groups remain below the 70 per cent threshold needed for herd immunity, a leading government medical adviser has warned.
David Hui Shu-cheong, chairman of the government’s scientific committee on emerging and zoonotic diseases, on Saturday reminded the public to get vaccinated ahead of Lunar New Year, when social gatherings are frequent.
He noted that 70 to 80 per cent of severe flu cases among both adults and…