Covid-19 (Temas de Saúde Pública)
Evidências reforçam que infecções por SARS-CoV-2 em indivíduos já vacinados (“breakthrough infections”) podem facilmente disseminar a variante Delta.
23 Ago, 2021 | 13:21hEstudo original: Shedding of Infectious SARS-CoV-2 Despite Vaccination when the Delta Variant is Prevalent – Wisconsin, July 2021 – medRxiv
Comentário no Twitter
The evidence that supports Delta breakthrough infections ability to spread (and why fully vaccinated people need to 😷 up)https://t.co/27NOf6mYCM @NatGeo by @Ecquis w/ studies and input by @GuptaR_lab and @KasenRiemersma
— Eric Topol (@EricTopol) August 20, 2021
Entre pacientes que recebem vacina de mRNA, sintomas clinicamente significativos são mais frequentes após a 2ª dose, após a 1ª dose em pacientes com infecção prévia por SARS-CoV-2 e naqueles que receberam a vacina da Moderna.
23 Ago, 2021 | 13:19h
Comentário no Twitter
New @JAMA_current paper says @moderna_Tx caused 2.3x the number of "significant" symptoms compared to @pfizer in a sample of 950 people.
Moderna also produced more antibodies. Raising the question of what a third dose, which produces still MORE, will do.https://t.co/drvhhsnpHo
— Alex Berenson (@AlexBerenson) August 16, 2021
Estudo laboratorial mostra que a estratégia de vacinação heteróloga AstraZeneca + Pfizer propicia uma imunogenicidade mais potente contra Covid comparada a estratégias homólogas AZ + AZ ou Pfizer + Pfizer.
23 Ago, 2021 | 13:16hComentário convidado: Heterologous ChAdOx1-nCoV19–BNT162b2 vaccination provides superior immunogenicity against COVID-19
Conteúdos relacionados:
Another study shows increased immune response with heterologous Oxford-AstraZeneca/mRNA vaccination (vários artigos sobre o tema)
Comentário no Twitter
NEW Research—Heterologous ChAdOx1 nCov-19–BNT162b2 immunisation w/ 10–12-week interval is well tolerated & improves immunogenicity vs homologous ChAdOx1 nCov-19 vax w/ 10–12-week interval & BNT162b2 vax w/ 3-week interval
Study from Prof Sander & co https://t.co/VAB54NokSi pic.twitter.com/wfeBsvoKhO
— The Lancet Respiratory Medicine (@LancetRespirMed) August 13, 2021
[Preprint] Transmissão de SARS-CoV-2 por aerossol em escolas: efetividade teórica de diferentes intervenções – “Intervenções combinadas (i.e., ventilação natural, máscaras e filtração HEPA) foram as mais eficazes (redução ≥ 30 vezes)”.
23 Ago, 2021 | 13:12hSARS-CoV-2 aerosol transmission in schools: the effectiveness of different interventions – medRxiv
Conteúdo relacionado: The right way to protect our children and return to in-person learning – CNN
Comentários no Twitter
Interesting modelling study for schools: (theoretically) most effective is open windows, then masks, then HEPA filter. Would be good to do real world tests though. https://t.co/MDFNqNNUI3 pic.twitter.com/xGSodClipO
— Paul Glasziou (@PaulGlasziou) August 21, 2021
This is not real evidence supporting real policy choices as they are really carried out in the real world.
Instead, this is theoretical bioplausibility spun into a full paper.
I hope folks can still tell the two aparthttps://t.co/znwtiaKZ2g
— Vinay Prasad, MD MPH 🎙️📷 (@VPrasadMDMPH) August 20, 2021
Vacina CoronaVac em idosos durante a epidemia de Covid-19 associada à variante Gama no Brasil – Efetividade foi de 46,8% contra doença sintomática, de 55,5% contra hospitalização e de 61,2% contra mortes.
23 Ago, 2021 | 13:10hEditorial: Real world effectiveness of covid-19 vaccines
Conteúdo relacionado: CoronaVac vaccine: its results are patchy, but the world can’t ignore its usefulness. (vários textos sobre o tema)
Dados observacionais do Canadá: Efetividade das vacinas de mRNA contra Covid-19 foi de 91% contra doença sintomática e de 98% contra hospitalização e mortes.
23 Ago, 2021 | 13:08hEditorial: Real world effectiveness of covid-19 vaccines
[Preprint] Eficácia da vacina da Pfizer contra a variante Delta diminui mais rapidamente do que a da AstraZeneca; ambas oferecem a mesma proteção depois de 4 meses.
20 Ago, 2021 | 12:35hComentários:
Pfizer vaccine effectiveness declines faster than AstraZeneca – study – Evening Standard
Comentário no Twitter
New large UK study confirms attrition of @Pfizer vaccine effectiveness vs Delta infections over time https://t.co/K6YRyAQq4o "By roughly 4 1/2 months after the 2nd dose, Pfizer’s shot will probably be about on par with Astra’s at preventing infections with a high viral burden" pic.twitter.com/x1Nl2BkWfn
— Eric Topol (@EricTopol) August 19, 2021
Covid-19: quantas variantes existem e o que se sabe sobre elas?
20 Ago, 2021 | 12:32hCovid-19: How many variants are there, and what do we know about them? – The BMJ
Comentário no Twitter
Eight notable variants of SARS-CoV-2 have been found since September 2020. @emahase_ reviews the line-up so far https://t.co/jmzfnbudoL
Watch this video showing how the variants have spread around the globe: pic.twitter.com/KwBl6B48Dy
— The BMJ (@bmj_latest) August 19, 2021
Novas variantes do SARS-Cov-2 mudaram a pandemia. O que o vírus fará a seguir?
20 Ago, 2021 | 12:31hNew SARS-CoV-2 variants have changed the pandemic. What will the virus do next? – Science
Comentário no Twitter
I really, really wish Covid deniers and minimizers would read this outstanding @ScienceMagazine piece by @kakape on the delta variant and how it has completely changed this pandemic – FOR THE WORSEhttps://t.co/liIC9NpGOJ pic.twitter.com/UkCieUUCpK
— Madhu Pai, MD, PhD (@paimadhu) August 19, 2021
Um alerta de Israel: a vacinação atenua, mas não acaba com a variante Delta.
20 Ago, 2021 | 12:29hA grim warning from Israel: Vaccination blunts, but does not defeat Delta – Science