搜尋結果
4 天前 · 由于病毒的 核酸 序列变异有可能导致 抗原漂移 ，而使得病毒得以逃避 宿主 的 免疫应答 ，并影响 疫苗 的效力 [1] ，这种现象称为 免疫逃避 （英语：antigenic escape） 。 已有五种被 世界卫生组织 認定为值得关注的变异株，它們分別為 Alpha變異株 、 Beta變異株 、 Gamma變異株 、 Delta變異株 以及 Omicron變異株 。 變異株對照表. ^ 1.0 1.1 1.2 1.3 1.4 被世界卫生组织列为 高關注變異株 （英语：Variant of concern）
2024年6月5日 · Since the beginning of the COVID-19 pandemic and with the evolution of the SARS-CoV-2 virus, multiple COVID-19 Variants of Concern (VOCs) and Variants of Interest (VOIs) have been designated by WHO based on their assessed potential for expansion and replacement of prior variants, for causing new waves with increased circulation, and for the need...
6 天前 · Pfizer and Moderna are stepping up trials of COVID-19 vaccines that specifically target the Omicron variant, as the highly contagious variant now accounts for 99.9 percent of new infections in the United States.
2024年6月17日 · On Thursday, Hong Kong's Centre for Health Protection announced it had found two confirmed cases whose genetic sequences belonged to a new strain of the virus, B.1.1.529, which the World Health Organization named Omicron on Friday, two days after it was discovered.
2024年6月11日 · NEW YORK - Pfizer Inc and BioNTech SE said on Tuesday they started a clinical trial to test a new version of their vaccine specifically designed to target the COVID-19 Omicron variant, which has eluded some of the protection provided by the original two-dose vaccine regimen.
3 天前 · Background Omicron variants are currently the predominant circulating lineage worldwide and most cases are mild or asymptomatic. The Omicron variant is characterized by high transmissibility and immune evasion. Early identification of Omicron cases in clinical settings is crucial for controlling its spread. Previous studies have indicated that changes in hematological parameters can be used to ...
polyclonal sera; mRNA vaccines. antibody evasion. receptor engagement. viral infectivity. The highly mutated SARS-CoV-2 Omicron subvariant BA.2.87.1, which emerged in South Africa in September 2023 [ 1, 2 ], has garnered global interest due to its unique constellation of many mutations in the spike protein.
