Covid-19 (Temas de Saúde Pública)

Aumento da variante Delta é impulsionado pela disseminação propiciada por pessoas assintomáticas.

20 Ago, 2021 | 12:28h

Delta’s rise is fuelled by rampant spread from people who feel fine – Nature

Estudo original: Transmission dynamics and epidemiological characteristics of Delta variant infections in China – medRxiv

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As origens do SARS-CoV-2: uma revisão crítica.

20 Ago, 2021 | 12:26h

The Origins of SARS-CoV-2: A Critical Review – Cell

Conteúdos relacionados:

The animal origin of SARS-CoV-2 – “Trading of animals susceptible to bat coronaviruses is the likely cause of the COVID-19 pandemic”.

Fauci says natural origins theory of coronavirus is still the most likely.

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Estudos: proteção da vacina diminui com o tempo em relação à infecção por COVID, mas a proteção contra hospitalização é duradoura.

19 Ago, 2021 | 12:27h

Studies: COVID vaccine protection waning against infection but not hospitalization – CIDRAP

Estudo 1: Sustained Effectiveness of Pfizer-BioNTech and Moderna Vaccines Against COVID-19 Associated Hospitalizations Among Adults — United States, March–July 2021 – CDC Morbidity and Mortality Weekly Report

Estudo 2: Effectiveness of Pfizer-BioNTech and Moderna Vaccines in Preventing SARS-CoV-2 Infection Among Nursing Home Residents Before and During Widespread Circulation of the SARS-CoV-2 B.1.617.2 (Delta) Variant — National Healthcare Safety Network, March 1–August 1, 2021 – CDC Morbidity and Mortality Weekly Report

Estudo 3: New COVID-19 Cases and Hospitalizations Among Adults, by Vaccination Status — New York, May 3–July 25, 2021 – CDC Morbidity and Mortality Weekly Report

 

Comentário no Twitter (fio – clique para saber mais)

Very excited to share our most recent publication about #CovidVaccine effectiveness, just published today by the IVY network. Especially relevant in light of today’s news about #boosters (spoiler – I’m skeptical about the need for boosters for all). 🧵https://t.co/GbAxgzpo7R

— Nida Qadir, MD (@NidaQadirMD) August 18, 2021

 

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Ponto de vista | Combatendo a variante Delta do SARS-CoV-2.

19 Ago, 2021 | 12:25h

Confronting the Delta Variant of SARS-CoV-2, Summer 2021 – JAMA

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Resposta do IDSA ao plano para doses suplementares de vacina para indivíduos já vacinados.

19 Ago, 2021 | 12:23h

Response to Plan for Supplemental Vaccine Doses for Vaccinated Individuals – Infectious Diseases Society of America

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Decisão oficial dos EUA sobre doses de reforço da vacina contra Covid-19 confunde – e irrita – alguns cientistas.

19 Ago, 2021 | 12:22h

U.S. officials’ decision on Covid-19 booster shots baffles — and upsets — some scientists – STAT

 

Comentário no Twitter

Scientists I spoke to today had a lot of questions about the administration's decision to start giving Americans 3rd doses of the mRNA vaccines next month. “I’m not sure we had enough [data] to pull the trigger right now," one said. https://t.co/eHUndOrQL4

— Helen Branswell (@HelenBranswell) August 18, 2021

 

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Estocagem de vacinas pelos países pode levar ao aumento dos casos de COVID-19 e ao surgimento de novas variantes.

19 Ago, 2021 | 12:20h

Vaccine nationalism and the dynamics and control of SARS-CoV-2 – Science

Comentário: Vaccine stockpiling by nations could lead to increase in COVID-19 cases, novel variant emergence – Princeton University

 

Comentário no Twitter

Published at @sciencemagazine, a new @PrincetonEnviro study shows that stockpiling driven by vaccine 'nationalism' could increase #COVID19 cases and the potential emergence of novel variants, stressing the importance of rapid global vaccine equity. https://t.co/ziN5fX0u2X

— Princeton University (@Princeton) August 18, 2021

 

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Estudo laboratorial mostra que a vacinação heteróloga AstraZeneca/Pfizer produz uma forte resposta imune contra a variante delta do SARS-CoV-2.

18 Ago, 2021 | 13:06h

SARS-CoV-2 delta variant neutralisation after heterologous ChAdOx1-S/BNT162b2 vaccination – The Lancet

Conteúdos relacionados:

RCT: Safety and immunogenicity of heterologous vs. homologous prime-boost schedules with an adenoviral vectored and mRNA COVID-19 vaccine.

Another study shows increased immune response with heterologous Oxford-AstraZeneca/mRNA vaccination (vários artigos sobre o tema)

 

Comentário no Twitter (fio – clique para saber mais)

Mix and match vaccines, AZ then mRNA (@BioNTech_Group) achieves a very strong immune response against the Delta variant.
This is the 1st report to look at mix vs Delta, specifically.https://t.co/6N46cUh8HW @TheLancet pic.twitter.com/cvlHp2XtXJ

— Eric Topol (@EricTopol) August 17, 2021

 

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EUA recomendam reforço da vacina contra COVID após 8 meses da vacinação plena.

18 Ago, 2021 | 13:03h

Sources: US to recommend COVID vaccine boosters at 8 months – Associated Press

Ver também: Biden administration expected to advise Covid booster shots for most Americans – CNN E US experts expected to recommend Covid booster shots for all – The Guardian

 

Comentário no Twitter (fio – clique para saber mais)

This decision seems to reflect a common fallacy; trying to reason about whether we "need X" just based on what things are like without X, rather than how much X will do to help.

It's surprising to see it at play in a decision of such consequence.

1/https://t.co/o95IBIyxjK

— Wes Pegden (@WesPegden) August 17, 2021

 

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Análise | Razão pela qual doses de reforço não são necessárias para todos por enquanto.

18 Ago, 2021 | 12:59h

ANALYSIS- Here’s why there may be no need for boosters for everyone just yet – CNN

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