Information on Influenza Vaccine – Quadrivalent (2020-21)

Information on Influenza Vaccine – Quadrivalent (2020-21)
流感 (四價) 疫苗注射資訊 (2020-21)

The below information is provided by Community Health Services Limited T/A CHC Group Medical Practice.
以下資料由聯保醫務所提供

The World Health Organisation (WHO) recommended that quadrivalent influenza vaccines for use in the 2020-2021 northern hemisphere influenza season contain the following:
世界衛生組織建議在 2020-2021 北半球流感季節使用的四價流感疫苗包含以下成分:

1) an A/Guangdong-Maonan/SWL1536/2019 (H1N1)pdm09-like strain
類甲型/廣東茂南/swl 1536/2019 (H1N1)pdm09-like 病毒株;
2) an A/Hong Kong/2671/2019 (H3N2)-like virus;
類甲型/香港/2671/2019 (H3N2)-like 病毒株;
3) a B/Washington/02/2019 (B/Victoria lineage)-like virus;
類乙型/華盛頓/02/2019 (B/Victoria 系源)-like 病毒株;
4) a B/Phuket/3073/2013 (B/Yamagata lineage)-like virus)
類乙型/布吉/3073/2013(B/Yamagata 系源)-like 病毒株

Influenza vaccine 流感疫苗

The influenza vaccine induces development of antibodies against influenza virus infection in the body.
流感疫苗可令身體產生抗體，而這些抗體可抵抗流感病毒。
It takes about two weeks after vaccination for antibodies to develop in the body and provide protection against influenza virus infection.
接種疫苗後身體約需兩星期產生抗體來預防流感病毒。
Influenza vaccine can be given with other vaccines at the same clinic visit.
流感疫苗可與其他疫苗在同一次到診時接種。

Influenza vaccination 流感疫苗接種

All members of the public aged 6 months or above, except those with known contraindications, should receive influenza vaccine for personal protection.
除個別有已知禁忌症的人士外，所有年滿 6 個月或以上人士都適宜接種季節性流感疫苗，以保障個人健康。
It is necessary to get vaccinated against seasonal every year. The immunity built up in a vaccinated person in the prior season will decrease over time and may become too low to provide protection in next season.
每年都要接種流感疫苗。在上一年度接種疫苗後建立的免疫力會隨著時間降低，在下一年度可能會降至沒有保護作用的水平。
Children under 9 years old who have not previously been vaccinated against influenza, a second dose should be given after an interval of at latest 4 weeks.
9 歲以下從未接種過流感疫苗的兒童，建議接種兩劑流感疫苗，而兩劑的接種時間至少相隔 4 個星期。

When should I get influenza vaccine? 何時是注射流感疫苗的最佳時候?

The best time to get a flu shot is in October to December. In Hong Kong, influenza is most common during the winter (January to March/April) and summer (July to August).
最佳注射時間是在每年的十至十二月，通常流感高峰期是在冬季(一月至三月/四月)和夏季(七月至八月)。

Some people have the below situation will not be suitable to have influenza vaccine:
以下人士不適宜注射流感疫苗：

fever on vaccination day
注射當天有發燒
a serious allergic reaction to eggs or some kinds of Antibiotics (Neomycin). Or to a previous dose of influenza vaccine
對雞蛋或某些抗生素(新黴素)有敏感或曾經在注射流感疫苗後有出現敏感反應
history of Guillain-Barrè Syndrome (GBS)
曾患吉-巴氏綜合症*
*GBS is a disease of neurological disorders (吉-巴氏綜合症是一種感染性神經炎，患者之症狀一般為下肢癱瘓)

What are the possible side effects of the inactivated influenza vaccine?
流感疫苗可能有甚麼副作用?

Occasional soreness, redness or swelling at the injection site.
接種疫苗處可能出現痛楚、紅腫
Some recipients may experience fever, muscle pain, and tiredness beginning 6 to 12 hours after vaccination and lasting up to two days.
部分人在接種後 6 至 12 小時内可能出現發燒、肌肉疼痛，及疲倦等症狀，這些症狀通常在兩天內減退。
If fever or discomforts persist, please consult a doctor.
若持續發燒或不適，請諮詢醫生。
Immediate severe allergic reactions like hives, swelling of the lips or tongue, and difficulties in breathing are rare and require emergency consultation.
如出現風疹塊、口舌腫脹或呼吸困難等較為罕見的嚴重過敏反應，患者必須立即求醫。

Information from:
1. World Health Organization
2. Centre for Health Protection