流感是由流感過濾性病毒引起的傳染病，傳染性極高，患者會有發燒的情況，而且達到攝氏39至40度，並有頭痛、嚴重咳嗽、極度疲倦、骨痛及肌肉痛等徵狀。流感跟傷風最大的分別是流感可以引起嚴重疾病，甚至是致命的並發癥。
When is the best time to get a flu vaccination?
什麼是註射流感疫苗的最佳時候？
Vaccination should happen before the flu season every year when the new vaccine becomes available, but it will never be too late to get vaccinated even during the flu season.
每年大約八月至九月期間，當新壹年度的流感疫苗到達香港時，便是我們接受疫苗註射的最佳時候，我們可以因此在流感高峰期前得到保護，而且可以維持壹年。
Is the flu vaccine safe?
流感疫苗安全嗎？
The vaccine will not give you flu. It contains noninfectious killed virus, but merely alerts the body to the threat of the virus.
Flu vaccines are well tolerated and safe. The most frequently associated reaction is mild soreness at the injection site that can last for 24 to 48 hours.
流感疫苗十分安全。它的主要成份是壹些已被完全殺死的流感病毒，所以絕不會致病。流感疫苗的功效是令身體自動產生抗體抵禦流感病毒的入侵。
在註射疫苗後，最常見的反應只是註射的部位有輕微的痛楚和紅腫，而且壹般不會持超過24至48小時。
What will flu vaccination do for me?
流感疫苗對我們有什麼好處？
- Life-saving for people at risk
- Avoidance of illness and hospitalization
- Avoidance of absenteeism from work or spoiling holidays
- Reduction of the risk of transmitting flu to family members, friends or co-workers
- 減低高危人仕由流感引至的死亡率
- 避免因流感而生病入院
- 避免因流感而不能上班、上學、甚至浪費計劃好了的寶貴假期
- 減少把流感病毒傳給家人、朋友或同事的機會
Why should I get a flu shot every year?
為什麼每年都要接受流感疫苗防疫註射？
The flu viruses are constantly changing. Generally, new influenza virus strains circulate every flu season, so each year, before flu season, the most active viruses are identified by WHO and included in a new vaccine formula in order to offer the best protection.
流感病毒經常變種。壹般來說，每個流感季節也有新品種的流感病毒出現。因此每年在流感季節前，世界衛生組織都會找出最活躍的流感病毒，以用作制造新疫苗的配方。而且流感免疫力會隨時間降低，壹年後可能會降低至沒有保護作用的水平，因此我們必須每年重新註射流感疫苗。
Who is at high risk of developing complications?
哪些人仕是流感高危群？
Some people are at an increased risk of developing life threatening complications if they contact flu, e.g. the elderly, adults and children who have diabetes, asthma, and chronic heart, lung and kidney disease.
他們包括長者，糖尿病患者，哮喘病患者，心臟病患者，肺病患者或腎病患者等。這些人患上流感後，會特別容易出現嚴重疾病或致命的並發癥。
Who is not suitable for vaccination?
哪些人仕不適宜註射流感疫苗？
People who are hypersensitive to active substances, to any of the excipients, to eggs, chicken proteins, neomycin, formaldehyde and octoxinol 9. Immunisation should be postponed in patients with febrile illness or acute infection.
凡對雞蛋，新黴素，甲醛，辛苯昔醇9或曾對流感疫苗有過敏反應者，都不宜接受流感疫苗註射。如註射當日有發燒，或急性感染的情況，請於病愈後接受註射。