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Coronavirus: Sinovac vaccine gives 70 per cent less protection against South African variant, but Hongkongers urged to still get jab
The level of protection offered by the Sinovac coronavirus vaccine dropped 70 per cent against the more infectious South African variant, according to data published by mainland scientists, but Hong Kong health experts on Tuesday sought to reassure residents that jabs available in the city were...
takeaways:
1. data published by mainland researchers early this month in the New England Journal of Medicine
2. the Sinovac coronavirus vaccine dropped 70 per cent against the more infectious South African variant
3. But the level is still higher than the [effective] threshold and can still neutralise the virus
4. In other similar studies, the neutralising-antibody level in those who got the BioNTech jab dropped 90 per cent against the South African variant.
5. The level dropped 50 per cent for the variant first identified in Britain, known as B.1.1.7.
moderna 自己的研究发现对南非的病毒抵抗力降低6倍。
While the Company expects these levels of neutralizing antibodies to be protective, pseudovirus neutralizing antibody titers were approximately 6-fold lower relative to prior variants. These lower titers may suggest a potential risk of earlier waning of immunity to the new B.1.351 strains.
Moderna COVID-19 Vaccine Retains Neutralizing Activity Against Emerging Variants First Identified in the U.K. and the Republic of South Africa | Moderna, Inc.
Out of an abundance of caution, Moderna launches clinical program to boost immunity to emerging variants Manuscript posted to preprint server; company to host conference call once manuscript is available CAMBRIDGE, Mass. --(BUSINESS WIRE)--Jan. 25, 2021-- Moderna Inc .
变异猛如虎
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