Efficacy of NVX-CoV2373 Covid-19 Vaccine against the B.1.351 Variant

Article Medicine, General & Internal

Safety and efficacy of the ChAdOx1 nCoV-19 vaccine (AZD1222) against SARS-CoV-2: an interim analysis of four randomised controlled trials in Brazil, South Africa, and the UK

Merryn Voysey et al.

Summary: The ChAdOx1 nCoV-19 vaccine has been shown to have an acceptable safety profile and effectiveness against symptomatic COVID-19, with higher efficacy observed in the group that received a low dose followed by a standard dose.

LANCET (2021)

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Article Multidisciplinary Sciences

SARS-CoV-2 spike glycoprotein vaccine candidate NVX-CoV2373 immunogenicity in baboons and protection in mice

Jing-Hui Tian et al.

Summary: The study reports the development of a SARS-CoV-2 subunit vaccine candidate that contains full-length spike protein stabilized in its prefusion conformation, showing immunogenicity in mice and protection in baboons with Matrix-M adjuvanted vaccine, supporting ongoing phase 1/2 clinical evaluation of NVX-CoV2373 with Matrix-M (NCT04368988).

NATURE COMMUNICATIONS (2021)

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Article Medicine, General & Internal

Safety and efficacy of an rAd26 and rAd5 vector-based heterologous prime-boost COVID-19 vaccine: an interim analysis of a randomised controlled phase 3 trial in Russia

Denis Y. Logunov et al.

Summary: The Gam-COVID-Vac vaccine showed 91.6% efficacy against COVID-19 in the phase 3 trial, with good safety and tolerability in a large cohort of participants.

LANCET (2021)

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Editorial Material Medicine, General & Internal

Resurgence of COVID-19 in Manaus, Brazil, despite high seroprevalence

Ester C. Sabino et al.

LANCET (2021)

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Article Multidisciplinary Sciences

mRNA vaccine-elicited antibodies to SARS-CoV-2 and circulating variants

Zijun Wang et al.

Summary: Volunteers who received the Moderna or Pfizer-BioNTech vaccine showed high levels of antibodies and memory B cell responses against SARS-CoV-2, with activity similar to individuals who had recovered from natural infection. However, their efficacy against specific SARS-CoV-2 variants was reduced, indicating a potential need for periodic updates to mRNA vaccines to maintain clinical efficacy.

NATURE (2021)

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Article Biochemistry & Molecular Biology

SARS-CoV-2 501Y.V2 escapes neutralization by South African COVID-19 donor plasma

Constantinos Kurt Wibmer et al.

Summary: The SARS-CoV-2 virus in the B.1.351 variant discovered in South Africa can evade neutralization by most antibodies when expressed, but does not affect binding by convalescent plasma. This suggests the potential for reinfection with antigenically distinct variants and predicts reduced efficacy of spike-based vaccines.

NATURE MEDICINE (2021)

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Article Medicine, General & Internal

Efficacy of the ChAdOx1 nCoV-19 Covid-19 Vaccine against the B.1.351 Variant

S. A. Madhi et al.

Summary: The ChAdOx1 nCoV-19 vaccine did not provide significant protection against mild-to-moderate Covid-19 caused by the B.1.351 variant, with an efficacy of 10.4%. The incidence of serious adverse events was balanced between the vaccine and placebo groups.

NEW ENGLAND JOURNAL OF MEDICINE (2021)

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Editorial Material Critical Care Medicine