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sci-hub.se

sci-hub website. get free access to academic journals. download research papers for free from sciencedirect, ieee, wiley, springer, nature and others

scienceopen.com

Abstract Background Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection and the resulting coronavirus disease 2019 (Covid-19) have afflicted tens of millions of people in a worldwide pandemic. Safe and effective vaccines are needed urgently. Methods In an ongoing multinational, placebo-controlled, observer-blinded, pivotal efficacy trial, we randomly assigned persons 16 years of age or older in a 1:1 ratio to receive two doses, 21 days apart, of either placebo or the BNT162b2 vaccine candidate (30 μg per dose). BNT162b2 is a lipid nanoparticle–formulated, nucleoside-modified RNA vaccine that encodes a prefusion stabilized, membrane-anchored SARS-CoV-2 full-length spike protein. The primary end points were efficacy of the vaccine against laboratory-confirmed Covid-19 and safety. Results A total of 43,548 participants underwent randomization, of whom 43,448 received injections: 21,720 with BNT162b2 and 21,728 with placebo. There were 8 cases of Covid-19 with onset at least 7 days after the second dose among participants assigned to receive BNT162b2 and 162 cases among those assigned to placebo; BNT162b2 was 95% effective in preventing Covid-19 (95% credible interval, 90.3 to 97.6). Similar vaccine efficacy (generally 90 to 100%) was observed across subgroups defined by age, sex, race, ethnicity, baseline body-mass index, and the presence of coexisting conditions. Among 10 cases of severe Covid-19 with onset after the first dose, 9 occurred in placebo recipients and 1 in a BNT162b2 recipient. The safety profile of BNT162b2 was characterized by short-term, mild-to-moderate pain at the injection site, fatigue, and headache. The incidence of serious adverse events was low and was similar in the vaccine and placebo groups. Conclusions A two-dose regimen of BNT162b2 conferred 95% protection against Covid-19 in persons 16 years of age or older. Safety over a median of 2 mont

oa.mg

What is a Ph.D. in Sociology? A research doctorate training scholars in social theory and research methods, typically fully funded and highly selective, often admitting under 10% of applicants.

researchgate.net

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datacite.org

In 2020, the DataCite General Assembly approved the introduction of consortium membership, where a group of like-minded organizations come together to collectively participate in DataCite’s community and governance activities and use DataCite’s DOI services. To limit the gap between the fees for Direct Members and Consortium Organizations and encourage active users to participate in DataCite governance, the fee model included the following provision: 'Consortium Organizations that expect to register more than 10.000 DOIs annually should transfer to Direct Membership within the following calendar year, or pay the additional membership fee (2.000€ annually) while remaining part of the consortium. This ensures that there is appropriate cost recovery based on the impact of cost drivers.'

pdfsearchengine.net

pdf search engine allows you to find free pdf books and files and download them to your computer. search through millions of online pdfs.

sciencegate.app

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journals4free.com

journals for free (j4f) provides a large database of links to free scientific journals available on the web. journals can be searched using free text and filtered by category, language and presence on other databases.

elib.dlr.de

deutsches zentrum für luft- und raumfahrt e.v., elib - dlr electronic library