Articles tagged with Sars Cov 2
Researchers developed a novel method to evaluate how mutations in the N protein impact rapid antigen tests' ability to detect antibodies. The study found that most major past and present variants of concern do not contain mutations affecting test performance, but some sequences could impact detection.
A NIH-funded team developed a method to evaluate how mutations in the SARS-CoV-2 N protein affect recognition by antibodies used in rapid antigen tests. The study found that none of the major past and present variants of concern contain N protein mutations affecting diagnostic antibody performance.
A study published in The New England Journal of Medicine found that mucosal antibodies in the airways significantly reduce the risk of omicron infection. High levels of these antibodies more than halved the risk of becoming infected, while also being associated with lower viral replication.
The Lancet Commission report highlights widespread, global failures in the COVID-19 response, resulting in millions of preventable deaths and reversed progress towards UN SDGs. The report calls for strengthened multilateral cooperation, improved technology, and international health financing to address future health threats.
A New York City-based study analyzed over 600,000 household contacts to determine the risks of acquiring SARS-CoV-2 infection after exposure. The research found specific risk factors associated with a higher likelihood of developing COVID-19
Researchers found that SARS-CoV-2 antibody levels remained high for at least 6 months after vaccination, providing long-term protection against subsequent infection. The study involved 2,100 West Virginia nursing home residents and staff who received COVID-19 vaccination.
A study in the Netherlands found that restricting flights from countries where COVID-19 variants of concern emerge is not enough to halt their spread. The researchers analyzed nearly 40,000 genome sequences and found that all four VOCs had already been introduced into the country by the time flight restrictions were implemented.
A new study suggests that an intranasal vaccine could be the best protection against COVID-19 by inducing mucosal immunity, which prevents initial infection and community spread. This type of immunity is crucial in achieving herd immunity, a concept currently hindered by existing injectable vaccines.
A recent study published in Ear, Nose & Throat Journal found that twice-daily nasal irrigation with saline solution significantly reduced hospitalizations and deaths among patients with COVID-19, particularly those aged 55 and older. The technique is safe, effective, and inexpensive, offering a vital public health impact.
Researchers identified a new mechanism by which SARS-CoV-2 induces inflammatory responses in COVID-19 patient lungs, leading to 'cytokine storm' and lasting tissue damage. The discovery highlights the role of plasmacytoid dendritic cells in triggering this response.
Researchers developed a label-free SERS method to detect the cysteine residues of the SARS-CoV-2 spike protein subunit, allowing consistent detection in human blood plasma, mucus, and saliva samples. This technique holds potential for diagnosing SARS-CoV-2 and other viral infections in remote areas.
Researchers found virus-specific T cells in the noses of people who received vaccines and later became infected with SARS-CoV-2, providing an additional layer of protection. These cells persisted for at least 20 weeks and could recognize various viral proteins, including those from the Omicron variant.
Researchers developed a novel, single-dose, intranasal treatment that reduces symptoms and viral shedding of multiple SARS-CoV-2 variants. The therapeutic interfering particle (TIP) treatment effectively blocks COVID-19 transmission in animal models.
The NEUROCOV project seeks to understand the interplay between SARS-CoV-2 infection and the nervous system, with a focus on immune response and neuronal functions. The research aims to predict risk for neurological symptoms and develop effective treatments.
A new study from the University of Kansas found that racial and ethnic minority populations in the US faced unique challenges while seeking COVID-19 information online, including misinformation, harassment, and hostility. Younger and healthier individuals were more resistant to vaccination due to lower perceived risk and benefit.
Researchers found that RK-33 inhibits the ability of SARS-CoV-2 to replicate in host cells, making it a potential broad-spectrum antiviral agent. The study showed that RK-33's antiviral capability remains consistent across four SARS-CoV-2 variants.
Research suggests that COVID-19 patients can transmit viruses with multiple genetic sequences simultaneously, which may impact the development of new variants. This complex sequence diversity highlights the need for continued research into the evolution and transmission of SARS-CoV-2.
A study by researchers at Linköping University suggests that severe COVID-19 infection has long-lasting negative effects on the immune system. The results showed that patients developed antibodies against SARS-CoV-2 within 2-3 weeks of symptoms, which then started to fall after six months.
Scientists at SLAC National Accelerator Laboratory have seen the critical interaction between SARS-CoV-2 protein Mpro and human immune system protein NEMO. The study reveals that Mpro can cut NEMO, slowing down the immune response and allowing the virus to evade the body.
Researchers at Case Western Reserve University found wide genetic variation in SARS-CoV-2 viruses among 360 patients, showing that all individual infections include multiple variants of the virus. The study highlights the importance of examining variations that are historically considered noise to better understand how these genetic ch...
Coronavirus levels in wastewater accurately predicted hospitalization peaks and healthcare pressure, enabling timely forecasting. The study's results demonstrate the value of virus surveillance in monitoring ongoing outbreaks.
A study found that neutralizing antibody levels against COVID-19 decline by at least 15% per month after a single booster shot, but can be restored with a second dose. Researchers tested serum from vaccinated adults and found a higher rate of decline in neutralizing antibodies against the BA.5 omicron variant.
Researchers found that individuals with symptoms of depression, anxiety and loneliness before contracting COVID-19 were more likely to develop post-infection complications. The study, published in JAMA Psychiatry, highlights the importance of mental health support for those affected by COVID-19.
A retrospective cohort study in Hunan Province, China, investigated the effectiveness of inactivated COVID-19 vaccines against the Delta variant. The study found that complete primary immunization protected against SARS-CoV-2 Delta variant infection, with higher infection risk among vaccinated household contacts.
A new study found that young Swiss military personnel with confirmed Covid-19 infections experienced symptoms like fatigue, reduced sense of smell, and psychological problems for up to 180 days. Long-term effects included increased BMI, high cholesterol, and lower physical stamina, suggesting a higher risk of metabolic disorders and ca...
A new study reviews over 2,000 years of history to shed light on the delay in recognizing airborne transmission of coronavirus. Despite increasing evidence, institutions and governments initially focused on surface disinfection and handwashing, leading to millions of deaths.
A third vaccine dose offers better protection against Omicron infection and hospitalization compared to two doses. The study found that a third dose maintained longer protection against infection for a longer time.
A new study finds that COVID-19 orphanhood is significantly higher in poorer countries due to pre-existing health and vaccine coverage inequity. The risk is driven by factors like poverty prevalence, lower GDP per capita, and non-communicable diseases.
Scientists modeled how different coronavirus shapes affect rotational diffusivity, impacting transmission and infective success. The study found that more elongated shapes result in slower rotation rates, potentially improving attachment to cells.
A new study found that people taking high doses of folic acid were 1.5 times more likely to get COVID-19 and 2.6 times more likely to die from the virus compared to those not on folic acid supplements. Methotrexate, an antifolate drug, mitigated this negative impact when given with folic acid.
New research from Flinders University found a molecular link between COVID-19 and serotonin cells in the gut. The study suggests that these cells synthesise and release serotonin, which is highly enriched for SARS-CoV-2 receptors, potentially worsening disease outcomes.
A study of 690 young children found that many had asymptomatic SARS-CoV-2 infections, which did not correlate with viral load. The findings suggest that relying on symptom screening may not be enough to control outbreaks in this age group.
A study published in NEJM found that individuals infected with previous SARS-CoV-2 variants have four times greater protection against the current Omicron BA.5 subvariant than those who were not infected. This hybrid immunity provides significant protection against future infections.
Researchers discovered a substance that increased immune response to an experimental COVID-19 shot in mice, producing antibodies 25 times greater than without an adjuvant. The new adjuvant, αGC-CPOEt, is being investigated as a potential treatment for COVID-19 and other infectious diseases.
Experts argue that flawed narratives and premature scientific conclusions led to ineffective public health measures, care home deaths, and lax vaccination policies. The UK's response fell short of its potential, with a death toll approaching 200,000, due to a lack of evidence-based decision-making.
A Charité study found that SARS-CoV-2 can trigger chronic fatigue syndrome (ME/CFS) in patients. Approximately half of post-COVID patients met the diagnostic criteria for ME/CFS, with distinct differences in laboratory results and disease progression between groups.
Researchers at Indian Institute of Science create a novel virus-like particle (VLP) to safely study SARS-CoV-2 mutations and trigger an immune response. The VLP is stable, can attach to host cells, and elicit antibodies that neutralize the live virus.
A large cross-sectional study found that baseline plasma antigen levels are highly associated with both the severity of pulmonary illness and clinically important patient outcomes in hospitalized COVID-19 patients. Higher antigen levels were linked to increased risk of pulmonary worsening and delayed hospital discharge.
Higher SARS-CoV-2 antigen levels in hospitalized patients correlate with worse pulmonary function and longer hospital stays. Antigen levels also predict disease severity and outcomes, suggesting their potential as a biomarker for COVID-19 treatment.
Researchers have found that human antibodies can incorporate foreign genetic material from the mitochondria and ends of chromosomes, leading to increased immune diversity. This discovery challenges the long-held assumption that antibody diversity results solely from gene mutations.
A study found that self-collected nasal swabs in children and adolescents have comparable SARS-CoV-2 detection rates to those collected by healthcare workers. This simple method could improve COVID-19 testing accessibility, particularly in resource-constrained settings.
The COVID-19 pandemic had a devastating impact on Mayotte, with over 4,000 laboratory-confirmed cases causing interruptions in work and healthcare services. The island's unique socioeconomic vulnerability and communication challenges affected the surveillance and monitoring of the outbreak.
A study by Osaka University researchers comprehensively analyzed mRNA and microRNA expression patterns in the blood of patients with severe COVID-19, revealing specific mRNAs and microRNAs associated with the immune response pathway. The findings suggest that interferon-β plays a crucial role in COVID-19 severity.
Researchers developed a DNA vaccine containing multiple parts of the virus, including ones that don't mutate as frequently. The vaccine protected mice against serious infection from the beta variant and activated immune cells recognizing the coronavirus found in bats.
A recent study published in Frontiers in Virology suggests that chronic COVID infections are the source of variants of concern. The researchers used a mechanistic, theoretical model to study the emergence of these variants, which were found to acquire a constellation of mutations that make them more transmissible and lethal. By identif...
A study by Hokkaido University scientists found a close association between clinical cases of COVID-19 and viral loads in wastewater, with the viral loads picking up to two days before the cases were detected. The researchers used wastewater-based epidemiology to track the spread of SARS-CoV-2 in the Tokyo 2020 Olympics and Paralympics.
Research suggests that regular physical activity is linked to a lower risk of COVID-19 infection and severity, including hospital admission and death. Adults who engaged in at least 500 MET minutes per week had a significant reduction in risk, with the highest protective effect observed at this threshold.
Researchers developed a new quantitative RT-qPCR assay to detect and quantify the Omicron variant of SARS-CoV-2 in wastewater. The assay revealed that Omicron displaced Delta as the dominant variant within just 3 weeks in an Italian population.
A systematic review and meta-analysis of 141 articles found the COVID-19 incubation period decreased from Alpha (5 days) to Omicron (3.42 days), highlighting the need for adjusted isolation periods
A large study of over 660,000 children found that SARS-CoV-2 infection is associated with a range of symptoms and health conditions. The research suggests that some children may experience persistent health issues after infection, highlighting the need for continued monitoring.
A study of 57 people with mild COVID-19 found that the average duration of infectiousness was five days, and two-thirds of cases remained infectious for at least five days after symptoms began. Lateral flow tests can safely shorten self-isolation by identifying when someone is no longer contagious.
Researchers have identified three natural compounds that bind to a key enzyme in the coronavirus, potentially blocking its replication. Hydroxyethylphenol, hydroxybenzaldehyde, and methyldihydroxybenzoate showed reduced activity against the papain-like protease enzyme, with effects ranging from 50-70%.
Researchers at UBC have discovered a key vulnerability across all major COVID-19 variants that can be targeted by neutralizing antibodies. The 'master key' identified is the antibody fragment V H Ab6, which effectively neutralizes SARS-CoV-2 by attaching to the epitope on the spike protein.
A recent study in Los Angeles County found that more than half of adults with Omicron variant infection were unaware of their infectious status. Health care employees had higher awareness rates than non-employees, highlighting the need for increased vigilance and testing to prevent transmission.
A new study from Cedars-Sinai researchers found that 56% of people infected with the Omicron variant were unaware they had COVID-19. The study suggests that a lack of infection awareness contributed to the fast spread of Omicron.
Researchers estimated long-term effectiveness of Pfizer-BioNTech COVID-19 vaccine against SARS-CoV-2 infection and critical infections among 3.2 million South Korean adolescents. The study found high vaccine effectiveness in preventing severe illnesses.
Researchers used x-ray crystallography to study the main protease of SARS-CoV-2 at various temperatures, revealing subtle conformational changes and potential targets for drug design. These findings may inspire the development of new antiviral drugs to counteract COVID-19 and prevent future pandemics.
A team of researchers from Princeton University and the Broad Institute created a fast, accurate, and equipment-free diagnostic test for COVID-19. The test uses CRISPR technology to detect SARS-CoV-2 variants and can be performed at home without special equipment, improving sensitivity and specificity compared to existing tests.
Researchers found that a thymidine phosphorylase (TYMP) inhibitor could help slow thrombosis in COVID-19 patients by targeting the SARS-CoV-2 spike protein. The gene's increased expression is linked to D-dimer levels and COVID-19 severity.
The AABB has released clinical practice guidelines for the appropriate use of COVID-19 convalescent plasma, recommending its use for nonhospitalized patients at high risk for disease progression. The guidelines suggest that CCP is most effective when transfused with high neutralizing titers early after symptom onset.