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Article
Medicine, General & Internal
Nick Andrews et al.
Summary: A study conducted in England showed that vaccines against SARS-CoV-2 provide high protection against hospitalization and death from Covid-19 at 20 weeks or more after vaccination. However, the effectiveness of the vaccines decreases over time, especially in individuals aged 65 and older and those with underlying risk factors.
NEW ENGLAND JOURNAL OF MEDICINE
(2022)
Article
Medicine, General & Internal
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.
Article
Medicine, General & Internal
Noa Dagan et al.
Summary: A study conducted in Israel on nearly 600,000 individuals showed that the BNT162b2 mRNA vaccine was effective in reducing the risk of infection, hospitalization, and severe Covid-19. The effectiveness in preventing death was 72% during the period from day 14 through day 20 after the first dose, and hospitalization was reduced by 87% for the period 7 or more days after the second dose, similar to results from a randomized trial.
NEW ENGLAND JOURNAL OF MEDICINE
(2021)
Article
Multidisciplinary Sciences
Rishi R. Goel et al.
Summary: This study found that immune memory to SARS-CoV-2 and its variants remains robust for at least 6 months after mRNA vaccination, with antibodies declining but still detectable in most individuals. mRNA vaccines also induced functional memory B cells and antigen-specific T cells, with recall responses primarily increasing antibody levels in individuals with preexisting immunity.
Article
Medicine, General & Internal
Victoria Jane Hall et al.
Summary: The study aimed to determine the factors associated with vaccine coverage for two COVID-19 vaccines in the UK and to document the vaccine effectiveness of the BNT162b2 mRNA vaccine among healthcare workers. Results showed that the vaccine can prevent both symptomatic and asymptomatic infections in working-age adults, with a vaccine effectiveness of 70% after the first dose and 85% after the second dose.
Article
Multidisciplinary Sciences
Takuya Tada et al.
Summary: Highly transmissible SARS-CoV-2 variants identified in India, including B.1.617 series, contain spike mutations that could contribute to increased transmissibility and potential resistance to vaccine-elicited antibodies. Current vaccines remain protective against the B.1.617.2 (Delta) variant, although there may be a slight decrease in neutralizing antibody potency.
Article
Biochemistry & Molecular Biology
David S. Khoury et al.
Summary: The level of neutralizing antibodies is closely related to immune protection against COVID-19, playing a crucial role in protecting against detected infection and severe infection. Studies have shown that neutralizing titers will decline over time after vaccination, leading to decreased protection against SARS-CoV-2 infection.
Letter
Medicine, General & Internal
Laith J. Abu-Raddad et al.
NEW ENGLAND JOURNAL OF MEDICINE
(2021)
Article
Medicine, General & Internal
Jamie Lopez Bernal et al.
Summary: This study estimated the real-world effectiveness of Pfizer-BioNTech BNT162b2 and Oxford-AstraZeneca ChAdOx1-S vaccines against confirmed COVID-19 symptoms, hospital admissions, and deaths. The vaccines showed significant reduction in symptomatic COVID-19 among older adults and further protection against severe disease. Both vaccines demonstrated similar effects and protection was maintained for over 6 weeks.
BMJ-BRITISH MEDICAL JOURNAL
(2021)
Article
Public, Environmental & Occupational Health
Mark G. Thompson et al.
MMWR-MORBIDITY AND MORTALITY WEEKLY REPORT
(2021)
Article
Medicine, General & Internal
Sue Pavord et al.
Summary: Phenotypes of VITT were defined in 220 patients in the United Kingdom who presented a median of 14 days after the first ChAdOx1 nCoV-19 vaccination. Half had cerebral venous sinus thrombosis, a third of whom also had intracranial hemorrhage. Mortality was 22%. Intravenous immune globulin may reverse VITT.
NEW ENGLAND JOURNAL OF MEDICINE
(2021)
Article
Medicine, General & Internal
Yinon M. Bar-On et al.
Summary: After receiving a third dose of the BNT162b2 mRNA vaccine, Israeli residents aged 60 and above who had previously received two doses of the vaccine saw significantly lower rates of confirmed Covid-19 infection and severe illness compared to those who did not receive a booster shot, indicating the effectiveness of the booster dose in reducing infection and severe illness.
NEW ENGLAND JOURNAL OF MEDICINE
(2021)
Article
Microbiology
Amin Addetia et al.
JOURNAL OF CLINICAL MICROBIOLOGY
(2020)
