Since COVID-19 and influenza viruses have a similar disease presentation, which both cause respiratory diseases, ranging from asymptomatic or mild to severe illness and death, it is difficult for ordinary people to distinguish. In order to have better preventive measures, influenza vaccines should be encouraged in the pandemic.
Vaccine residues are updated every year according to the prevailing strains. Therefore, it is necessary to get vaccinated against seasonal influenza every year. It is recommended to get vaccination at least two weeks before the beginning of the flu season, as immunity to influenza begins approximately 2 weeks after having the shot, so that there is sufficient protection during the flu season.
The World Health Organisation (WHO) recommends that quadrivalent vaccines to be used in the 2021-2022 influenza season (northern hemisphere winter virus) contain the following:
• A/Victoria/2570/2019 (H1N1) pdm09-like virus
• A/Cambodia/e0826360/2020 (H3N2)-like virus
• B/Washington/02/2019 (B/Victoria lineage)-like virus
• B/Phuket/3073/2013 (B/Yamagata lineage)-like virus
You may click here to visit Centre for Health Protection (CHP) website for the latest information of the Vaccination Subsidy Scheme.