Hong Kong health authorities are urging the public to get the latest Covid vaccine in a timely manner, as more than five months have passed since the last surge and the next wave is approaching. The Centre for Health Protection notes that Covid-19 active periods occur in cycles every six to nine months, linked to changes in predominant strains and declining herd immunity.
Hong Kong's Centre for Health Protection stated on Friday that Covid-19 active periods typically occur in cycles every six to nine months. With more than five months passed since the last upsurge, the centre is urging the public to get vaccinated promptly to reduce the risk of severe illness and death.
Controller Dr Edwin Tsui Lok-kin said: “According to the centre’s analysis, the active periods are associated with the changes in the predominant circulating strains and a decline in herd immunity in Hong Kong.”
Since late March, the local predominant strains have shifted from KP.2 and KP.3 to NB.1.8.1. The latest surveillance data shows that NB.1.8.1 and LP.8.1 are currently co-circulating in the community.
Guidance from the World Health Organization supports timely vaccinations to address emerging variants. Authorities in Hong Kong stress that vaccination remains a key measure to prevent severe cases, particularly as immunity wanes over time.
This call aims to keep the public vigilant, even as the overall pandemic has stabilized, highlighting the need to monitor periodic fluctuations.
