Covid-19 | Page 42 of 100 | Links Medicus Content Curation & Alerts in Medicine

Cohort Study: The effectiveness of heterologous AstraZeneca (AZ)/mRNA prime-boost vaccination was more significant (68%) compared to the effectiveness of homologous AZ/AZ vaccination (50%) against symptomatic Covid-19 infection in Sweden.

20 Oct, 2021 | 10:27h | UTC

Effectiveness of heterologous ChAdOx1 nCoV-19 and mRNA prime-boost vaccination against symptomatic Covid-19 infection in Sweden: A nationwide cohort study – The Lancet Regional Health Europe

Commentary: High effectiveness of mix-and-match COVID-19 vaccines – UMEA University

Study evaluated several heterologous SARS-CoV-2 vaccine regimens; no efficacy data but there was increased antibody production on study days 15 and 29 after booster shots from Moderna and Pfizer.

A primer on what we know about mixing and matching Covid vaccines.

Real-world data shows increased reactogenicity in adults after heterologous compared to homologous prime-boost COVID-19 vaccination.

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.

Heterologous Oxford–AstraZeneca and Moderna Vaccination induce increased levels of neutralizing antibody compared to 2 doses of Oxford–AstraZeneca.

Heterologous Oxford–AstraZeneca and BioNTech/Pfizer Vaccination induce increased levels of neutralizing antibody compared to 2 doses of Oxford–AstraZeneca.

[Preprint] Mixing Covid jabs has good immune response, study finds – “The Com-Cov trial looked at the efficacy of either two doses of Pfizer, two of AstraZeneca, or one of them followed by the other. All combinations worked well, priming the immune system”.

Phase 2 RCT: Immunogenicity and reactogenicity of a Pfizer-BioNTech booster in patients that have received a single dose of AstraZeneca vaccine – “BNT162b2 (Pfizer) given as a second dose in individuals prime vaccinated with ChAdOx1-S (AstraZeneca) induced a robust immune response, with an acceptable and manageable reactogenicity profile”.

Lab study shows heterologous AstraZeneca/Pfizer vaccination produces strong immune response against SARS-CoV-2 Delta variant.

Lab study shows a heterologous AstraZeneca + Pfizer immunization strategy provides stronger immunogenicity against Covid compared to homologous AZ + AZ or Pfizer + Pfizer strategies.

RCT: Mixing 2 different Covid vaccines is associated with increased risk of side effects.

Commentary on Twitter

Study from Sweden assessing heterogenous vaccination in 3,445,061 individuals who received AZ as the first dose and either #pfizer, #moderna, or #AZ as second dose showed the following vaccine effectiveness:

AZ/Pfizer- 67%
AZ/Moderna- 79%
AZ/AZ- 50%https://t.co/UN0pey2kJ2

— Yan Leyfman, MD (@YLeyfman) October 19, 2021

Should You Mix and Match Your Booster Shot?

20 Oct, 2021 | 10:25h | UTC

Should You Mix and Match Your Booster Shot? – The Atlantic

Study evaluated several heterologous SARS-CoV-2 vaccine regimens; no efficacy data but there was increased antibody production on study days 15 and 29 after booster shots from Moderna and Pfizer.

A primer on what we know about mixing and matching Covid vaccines.

Real-world data shows increased reactogenicity in adults after heterologous compared to homologous prime-boost COVID-19 vaccination.

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.

Heterologous Oxford–AstraZeneca and Moderna Vaccination induce increased levels of neutralizing antibody compared to 2 doses of Oxford–AstraZeneca.

Heterologous Oxford–AstraZeneca and BioNTech/Pfizer Vaccination induce increased levels of neutralizing antibody compared to 2 doses of Oxford–AstraZeneca.

Lab study shows heterologous AstraZeneca/Pfizer vaccination produces strong immune response against SARS-CoV-2 Delta variant.

Lab study shows a heterologous AstraZeneca + Pfizer immunization strategy provides stronger immunogenicity against Covid compared to homologous AZ + AZ or Pfizer + Pfizer strategies.

RCT: Mixing 2 different Covid vaccines is associated with increased risk of side effects.

RCT: Interferon does not improve outcomes for hospitalized adults with COVID-19.

20 Oct, 2021 | 10:28h | UTC

News release: Interferon does not improve outcomes for hospitalized adults with COVID-19 – NIH News Releases

Original study: Efficacy of interferon beta-1a plus remdesivir compared with remdesivir alone in hospitalised adults with COVID-19: a double-bind, randomised, placebo-controlled, phase 3 trial – The Lancet Respiratory Medicine

[Preprint] Observational study in Brazil showed the J&J vaccine adjusted effectiveness was 50.9% against any symptomatic Covid-19, 72.9% for hospitalization, 92.5% for ICU admission, 88.7% for mechanical ventilation, and 90.5% for death.

20 Oct, 2021 | 10:24h | UTC

Vaccine effectiveness of Ad26.COV2.S against symptomatic COVID-19 and clinical outcomes in Brazil: a test-negative study design – medRxiv

Covid-19: New mutation of Delta variant under close watch in UK.

20 Oct, 2021 | 10:21h | UTC

Covid-19: New mutation of Delta variant under close watch in UK – BBC

Long-term consequences of the misuse of ivermectin data.

19 Oct, 2021 | 09:56h | UTC

Long-term consequences of the misuse of ivermectin data – The Lancet Infectious Diseases

Ivermectin: How false science created a Covid ‘miracle’ drug.

Fraudulent ivermectin studies open up new battleground between science and misinformation.

The lesson of ivermectin: meta-analyses based on summary data alone are inherently unreliable.

Ivermectin: Cochrane’s most talked about review so far, ever. Why?

Flawed ivermectin preprint highlights challenges of COVID drug studies.

Systematic review: no evidence to support the use of Ivermectin for treating or preventing COVID-19.

Why was a major study on ivermectin for covid-19 just retracted?

RCT: Ivermectin does not prevent hospitalizations in patients with COVID-19.

Ivermectin for the treatment of COVID-19: A systematic review and meta-analysis of randomized controlled trials – “IVM did not reduce all-cause mortality, length of stay or viral clearance in RCTs in COVID-19 patients with mostly mild disease”.

Ivermectin is the new hydroxychloroquine, take 2 – “Ivermectin shouldn’t be used to treat COVID-19 outside of the context of a well-designed clinical trial”.

Therapeutics and COVID-19 | WHO guideline update advises Ivermectin should only be used to treat COVID-19 within clinical trials

RCT: Ivermectin does not improve time to resolution of symptoms among adults with mild COVID-19

Commentary on Twitter

Ivermectin's data for Covid, checkered with inconsistencies, small/low quality clinical trials, and fraud, have long-term consequences for the drug's established and essential useshttps://t.co/NG6vpej8GP @TheLancetInfDis pic.twitter.com/Oz0FxUJetK

— Eric Topol (@EricTopol) October 18, 2021

RECOVERY Trial: In patients admitted to hospital with COVID-19, Colchicine did not reduce 28-day mortality, duration of hospital stay, or risk of progressing to invasive mechanical ventilation or death.

19 Oct, 2021 | 10:14h | UTC

Colchicine in patients admitted to hospital with COVID-19 (RECOVERY): a randomised, controlled, open-label, platform trial – The Lancet Respiratory Medicine

[Preprint] PRINCIPLE RCT: Colchicine does not improve time to recovery in outpatients with Covid-19 at higher risk of complications.

COLCORONA RCT: Colchicine for community-treated patients with COVID-19 – findings suggest it may lower death and hospital admission rates, but further studies are required.

[Preprint] RECOVERY Trial: Colchicine does not improve outcomes in patients admitted to hospital with COVID-19.

Systematic Review: Colchicine for the treatment of COVID‐19 – not beneficial for hospitalized patients; inconclusive evidence for the treatment of non-hospitalized patients, “probably slightly reduces the need for hospitalization or death within 28 days compared to placebo”.

19 Oct, 2021 | 10:13h | UTC

Colchicine for the treatment of COVID‐19 – Cochrane Library

[Preprint] PRINCIPLE RCT: Colchicine does not improve time to recovery in outpatients with Covid-19 at higher risk of complications.

COLCORONA RCT: Colchicine for community-treated patients with COVID-19 – findings suggest it may lower death and hospital admission rates, but further studies are required.

[Preprint] RECOVERY Trial: Colchicine does not improve outcomes in patients admitted to hospital with COVID-19.

Commentary on Twitter

JUST PUBLISHED – Is #colchicine (often used to treat #gout) an effective treatment for people with #COVID19? ➡️ https://t.co/IF1enksFpn New @CochraneHaem systematic review includes evidence from 4 RCTS with 11,525 hospitalised & 4488 non‐hospitalised people.

— The Cochrane Library (@CochraneLibrary) October 18, 2021

China’s COVID vaccines have been crucial — now immunity is waning.

19 Oct, 2021 | 09:53h | UTC

China’s COVID vaccines have been crucial — now immunity is waning – Nature

[Preprint] Breakthrough SARS-CoV-2 infections in 620,000 U.S. Veterans, February 1, 2021 to August 13, 2021 – “Vaccine protection declined by mid-August 2021, decreasing from 91.9% in March to 53.9%”.

Observational study in Qatar showed the effectiveness of Pfizer vaccine against any SARS-CoV-2 infection dropped to 20% in months 5 through 7 after the second dose, but effectiveness against severe Covid-19 remained high.

Cohort study: Pfizer vaccine effectiveness against any infections declined from 88% during the first month after full vaccination to 47% after 5 months. Vaccine effectiveness against hospital admissions remained high; 87% within 1 month, and 88% at 5 months after full vaccination, with no significant waning.

Editorial | Covid-19 vaccination: evidence of waning immunity is overstated.

COVID vaccine immunity is waning — how much does that matter? – “As debates about booster shots heat up, what’s known about the duration of vaccine-based immunity is still evolving”.

COVID vaccine effects wane over time but still prevent death and severe illness.

Perspective | What we actually know about waning immunity.

Another study shows Pfizer mRNA vaccine immunity is reduced over time.

[Press release – not published yet] Study shows vaccine protection wanes over time, but vaccines still offer good protection against severe disease.

Studies: COVID vaccine protection waning against infection but not hospitalization.

BJS commission on surgery and perioperative care post-COVID-19.

19 Oct, 2021 | 09:52h | UTC

BJS commission on surgery and perioperative care post-COVID-19 – British Journal of Surgery

Commentary on Twitter

The @BJSurgery commission on surgery and perioperative care post #Covid_19

🌐 Global surgical community involved

😱 Pandemic uncovers problems in healthcare systems

🧑‍🎓 Training severely damaged

🧿 Ethics committee needed at surgical oncology centreshttps://t.co/CfNk9vBPjV pic.twitter.com/vomtZ3zcql

— Giovanni Marchegiani (@Gio_Marchegiani) October 16, 2021

Editorial: Preparing for “Disease X”.

19 Oct, 2021 | 09:54h | UTC

Preparing for “Disease X” – Science

RCT supports the use of therapeutic heparin in moderately ill patients admitted to the hospital with Covid-19.

17 Oct, 2021 | 21:35h | UTC

Effectiveness of therapeutic heparin versus prophylactic heparin on death, mechanical ventilation, or intensive care unit admission in moderately ill patients with covid-19 admitted to hospital: RAPID randomised clinical trial – The BMJ

Commentary: High-dose of readily available blood thinner reduces risk of death for moderately ill COVID-19 patients – St. Michael’s Hospital

Related studies (some conflicting results)

RCT: Therapeutic-dose heparin superior to standard prophylactic or intermediate-dose heparins for thromboprophylaxis in high-risk hospitalized patients with COVID-19.

Another meta-analysis suggests standard-dose prophylactic anticoagulation is the best option for patients hospitalized with Covid-19.

M-A: Safety and efficacy of different prophylactic anticoagulation dosing regimens in critically and non-critically ill patients with COVID-19 – According to this analysis, standard-dose prophylactic anticoagulation should be the standard of care for hospitalized patients with COVID-19 who do not have an indication for therapeutic anticoagulation, irrespective of disease severity.

RCT: In noncritically ill patients hospitalized with Covid-19, therapeutic-dose anticoagulation with heparin increased the probability of survival to hospital discharge compared with usual-care thromboprophylaxis.

RCT: In critically ill patients with Covid-19, therapeutic anticoagulation with heparin did not result in improved outcomes compared to usual-care pharmacologic thromboprophylaxis.

RCT: In patients hospitalized with Covid-19 with elevated D-Dimer, a full-dose anticoagulation strategy based on rivaroxaban (full-dose heparins in unstable patients) + rivaroxaban to day 30 was not better than prophylactic anticoagulation and increased bleeding risk.

Commentary on Twitter

What are the effects of therapeutic heparin compared with prophylactic heparin among moderately ill patients with covid-19 admitted to hospital? #BMJResearch by @sholzberg and colleagues.

Includes a #VisualAbstract summarising the study #BMJInfographic https://t.co/82VisuBKSU pic.twitter.com/b06TdIJvLX

— The BMJ (@bmj_latest) October 15, 2021

J&J COVID-19 Vaccine: FDA recommends booster shot for all adults aged 18 and older at least two months following initial vaccination with the single-shot vaccine.

17 Oct, 2021 | 21:32h | UTC

News release: Johnson & Johnson COVID-19 Vaccine Booster Shot Unanimously Recommended for Emergency Use Authorization by U.S. FDA Advisory Committee

Commentaries:

FDA panel endorses booster shot for J&J COVID-19 vaccine – Associated Press

The Johnson & Johnson one-dose vaccine offers good protection now. A booster shot will maximize that, experts say – CNN

FDA advisers recommend J&J Covid-19 vaccine boosters, talk mix and match boosters – CNN

[Preprint] Breakthrough SARS-CoV-2 infections in 620,000 U.S. Veterans, February 1, 2021 to August 13, 2021 – “Vaccine protection declined by mid-August 2021, decreasing from 91.9% in March to 53.9%”.

17 Oct, 2021 | 21:29h | UTC

Breakthrough SARS-CoV-2 infections in 620,000 U.S. Veterans, February 1, 2021 to August 13, 2021 – medRxiv

Editorial | Covid-19 vaccination: evidence of waning immunity is overstated.

COVID vaccine immunity is waning — how much does that matter? – “As debates about booster shots heat up, what’s known about the duration of vaccine-based immunity is still evolving”.

COVID vaccine effects wane over time but still prevent death and severe illness.

Perspective | What we actually know about waning immunity.

Another study shows Pfizer mRNA vaccine immunity is reduced over time.

[Press release – not published yet] Study shows vaccine protection wanes over time, but vaccines still offer good protection against severe disease.

Studies: COVID vaccine protection waning against infection but not hospitalization.

Commentary on Twitter

New on breakthrough infections in 620,000 Veterans
"Vaccine protection declined by mid-August 2021, decreasing from 91.9% in March to 53.9%"https://t.co/xonBb4aEqJ highest reduction with J&J vaccine pic.twitter.com/rbhXOREFPP

— Eric Topol (@EricTopol) October 15, 2021

Review: SARS-CoV-2 Dose, Infection, and Disease Outcomes for COVID-19.

17 Oct, 2021 | 21:30h | UTC

SARS-CoV-2 Dose, Infection, and Disease Outcomes for COVID-19 – A Review – Clinical Infectious Diseases

Commentary from the author on Twitter (thread – click for more)

SARS-CoV-2 Dose, Infection, and Disease Outcomes for COVID-19 – A Review @brosseau_lisa @KevinEscandonMD @AngelaKUlrich @angie_rasmussen Chad Roy @neuronerdsunite @SaskiaPopescu @mtosterholm
https://t.co/2rv0oH1OM5
Quick 🧵 1/ @CIDRAP @acinnacional pic.twitter.com/7lnNYu6eto

— Kevin Escandón (@KevinEscandonMD) October 15, 2021

What can masks do? Part 2: What makes for a good mask study — and why most fail.

17 Oct, 2021 | 21:25h | UTC

COMMENTARY: What can masks do? Part 2: What makes for a good mask study — and why most fail – CIDRAP

Eight months later: Researchers compare immune responses elicited by three COVID-19 vaccines.

17 Oct, 2021 | 21:27h | UTC

News release: Eight months later: Researchers compare immune responses elicited by three COVID-19 vaccines – Beth Israel Deaconess Medical Center

Original study: Differential Kinetics of Immune Responses Elicited by Covid-19 Vaccines – New England Journal of Medicine

Commentary on Twitter

Just published @NEJM
Neutralizing antibody levels and T cells response out to 8 months for Pfizer, Moderna and J&J vaccines https://t.co/ghAgk3Y4kR
Moderna highest antibody response; J&J while lower doesn't fall off and best CD8 T-cell response at 8 months pic.twitter.com/uANSzAylMF

— Eric Topol (@EricTopol) October 15, 2021

PHE Statement: The role of face coverings in mitigating the transmission of SARS-CoV-2 virus.

15 Oct, 2021 | 02:52h | UTC

The role of face coverings in mitigating the transmission of SARS-CoV-2 virus: statement from the Respiratory Evidence Panel – Public Health England

Commentary on Twitter

https://twitter.com/OutbreakJake/status/1448651504563355657

What can masks do? The science behind COVID-19 protection.

15 Oct, 2021 | 02:51h | UTC

COMMENTARY: What can masks do? Part 1: The science behind COVID-19 protection – CIDRAP

Study evaluated several heterologous SARS-CoV-2 vaccine regimens; no efficacy data but there was increased antibody production on study days 15 and 29 after booster shots from Moderna and Pfizer.

15 Oct, 2021 | 02:49h | UTC

Heterologous SARS-CoV-2 Booster Vaccinations: Preliminary Report – medRxiv

Commentary: Study: Mixing and Matching COVID-19 Booster Shots Is Effective, Safe – U.S. News

Commentary on Twitter

So yes, mRNA vaccines are great at generating antibodies but what does that mean? Where is the efficacy data? How come JnJ gets really great efficacy at preventing symptomatic COVID and severe disease with low antibodies? T-cells? Still much to learn. https://t.co/YwKUyogAhQ

— Daniel Griffin MD PhD (@DanielGriffinMD) October 13, 2021

‘I hope you die’: how the COVID pandemic unleashed attacks on scientists.

15 Oct, 2021 | 02:46h | UTC

‘I hope you die’: how the COVID pandemic unleashed attacks on scientists – Nature

Commentary on Twitter

#COVID19 has changed many things- one has been the way the public interacts with scientists.

Like many of my colleagues I was not prepared for the onslaught of harassment and it affected me deeply.

Thanks to @Nature for telling our stories https://t.co/PiVCREyc8A

— Krutika Kuppalli, MD FIDSA (@KrutikaKuppalli) October 13, 2021

Statins linked to reduced risk of death from COVID-19 in major population study – “Randomized studies will be needed to ascertain whether there is a causal relationship, note the researchers”.

15 Oct, 2021 | 02:47h | UTC

News release: Statins linked to reduced risk of death from COVID-19 in major population study – Karolinska Institutet

Original study: HMG-CoA reductase inhibitors and COVID-19 mortality in Stockholm, Sweden: A registry-based cohort study – PLOS Medicine

Commentaries:

Expert reaction to study looking at statins and risk of death from COVID-19 – Science Media Centre

People taking statins less likely to die from Covid, study suggests – The Guardian

Perspective | Trying to Block SARS-CoV-2 Transmission With Intranasal Vaccines.

15 Oct, 2021 | 02:44h | UTC

Trying to Block SARS-CoV-2 Transmission With Intranasal Vaccines – JAMA

Editorial: Covid-19 treatments and vaccines must be evaluated in pregnancy.

15 Oct, 2021 | 02:41h | UTC

Covid-19 treatments and vaccines must be evaluated in pregnancy – The BMJ

Two observational studies suggest spontaneous abortion is not increased following COVID-19 mRNA vaccination during pregnancy.

Study shows high effectiveness of the Pfizer mRNA COVID-19 vaccine in pregnancy.

5 Crucial Things to Know About COVID-19 Vaccines and Pregnancy.

CDC Guidance: Pregnant people should be vaccinated against COVID-19.

ACOG and SMFM Recommend COVID-19 Vaccination for Pregnant Individuals – “ACOG encourages its members to enthusiastically recommend vaccination to their patients.”

Cohort study: Pfizer/BioNTech COVID vaccine associated with 78% lower risk of Covid-19 in pregnancy.

Commentary on Twitter

Inconsistent messaging from authorities, driven by lack of trial data, has increased covid-19 vaccine hesitancy among pregnant women@DrAllyah and colleagues argue that pregnant women should be included in drug and vaccine development from the outsethttps://t.co/P3v1ouk8tQ

— The BMJ (@bmj_latest) October 14, 2021

FDA panel green-lights Moderna COVID boosters for risk groups.

15 Oct, 2021 | 02:43h | UTC

FDA panel green-lights Moderna COVID boosters for risk groups – CIDRAP

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