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根據世衛,第一代新冠原始株疫苗仍有效預防重症、入院治療及死亡,但隨著病毒不斷變種,其效能可能會隨時間降低 ¹ ²。因此,新冠疫苗亦需定期更新。現時最新型的mRNA二價疫苗就是針對傳染度高的Omicron變異株BA.4/5研發,有助我們進一步對抗變種病毒³。
目前,除了疫情嚴峻期間普遍採用、每瓶供5至6人接種的瓶裝疫苗外,市場上最近亦引入每支僅為單人接種的「預充式」mRNA二價疫苗,為市民提供更多選擇⁴。
想了解更多有關更多有關新冠二價疫苗的資訊,請預約醫生查詢,保障你和家人的健康。
資料來源:
1. World Health Organization. COVID-19: variants. Accessed August 1, 2023. https://www.who.int/westernpacific/emergencies/covid-19/information/covid-19-variants
2. World Health Organization. Report of the meeting of the WHO Technical Advisory Group on COVID-19 Vaccine Composition, 14 April,
2023. Accessed August 01, 2023. https://www.who.int/zh/news/item/14-04-2023-report-of-the-meeting-of-the-who-technical-advisory-group-on-covid-19-vaccine-composition-(tag-co-vac)-held-on-16-17-march-2023
3. U.S. Food and Drug Administration. COVID-19 Bivalent Vaccines. Updated May 30, 2023. Accessed August 01, 2023.
https://www.fda.gov/emergency-preparedness-and-response/coronavirus-disease-2019-covid-19/covid-19-bivalent-vaccines
4. Centers for Disease Control and Prevention. Vaccine Storage and Handling Toolkit. Updated January 2023.
https://www.cdc.gov/vaccines/hcp/admin/storage/toolkit/storage-handling-toolkit.pdf
提供新冠mRNA疫苗接種服務