Articles tagged with Sars Cov 2
Antibodies that mimic the SARS-CoV-2 virus may explain lingering symptoms of long-haul COVID-19 and rare vaccine side effects like allergic reactions and blood-clotting. This theory, based on classic immunological concepts, suggests a cascade of immune responses that can lead to adverse effects.
Researchers from Istituto Italiano di Tecnologia have developed a new precision strategy to hinder coronavirus infection by blocking the ACE2 receptor. The study, published in Pharmacological Research, reveals two anti-K353 aptamers that dose-dependently inhibit viral spike protein binding to human ACE2, preventing cell infection.
A study of 2.5 million people found lower COVID-19 infection rates among those with schizophrenia and mood disorders, but higher death rates. The analysis suggests that underlying mental health conditions may impact COVID-19 outcomes.
Researchers found coronaviruses closely related to SARS-CoV-2 in Shamel's horseshoe bats sampled in 2010. The discovery suggests a wider geographic distribution of the virus and its potential spillover from bat-borne viruses. Surveillance in Southeast Asia is crucial for pandemic preparedness.
A real-world study of BBV152 found that two doses resulted in 50% effectiveness against symptomatic COVID-19 in hospital workers. The study's findings support the importance of a second dose for maximum protection, but highlight limitations in estimating vaccine effectiveness against severe outcomes.
Pathologists have discovered that some patients with lingering COVID-19 symptoms may have underlying chronic lung disease prior to their infection. This finding suggests that clinicians should carefully consider alternative explanations for respiratory symptoms beyond long COVID.
The Delta variant of SARS-CoV-2 has become the dominant virus form in Benin, West Africa, with over 60% of cases linked to the variant. Vaccination campaigns are crucial to combat the spread, as only 1% of the population is vaccinated.
Researchers found that wet masks make it more difficult for respiratory droplets to penetrate and escape the mask, splintering into smaller aerosolized particles. This is because wet masks create additional resistance due to their hydrophobic or hydrophilic materials, making them more effective at stopping droplet penetration.
Researchers from Osaka University found that over half of intensive care workers experienced moral distress during the pandemic due to limited communication with patients and families. Virtual communication and psychological support were identified as potential solutions to prevent burnout and ensure proper medical care.
A Rutgers study found that COVID-19 saliva testing kits with a preservative can accurately measure the oral microbiome, which may lead to new treatments for lung health in people with COVID-19. The study collected saliva samples from participants and compared their ability to measure microbes before and after COVID-19 infection.
Researchers at UArizona Health Sciences will lead a statewide effort to study the long-term effects of COVID-19, with a focus on identifying risks and developing approaches for treatment and prevention. The study aims to understand the basis of prolonged symptoms and improve recovery outcomes.
UC San Diego researchers developed a computer model to understand how viruses travel through the air, shedding new light on airborne COVID-19 transmission. The model simulates aerosol behavior and helps explain why SARS-CoV-2 is highly transmissible through the air.
Previous antibody responses to harmless coronaviruses contribute to SARS-CoV-2 immunity, reducing infection severity and hospitalization rates. Researchers found that people with strong immune responses to other human coronaviruses have some protection against SARS-CoV-2 infection.
People taking immunosuppressants, especially TNF inhibitors, have a weaker antibody response to COVID-19 vaccines. A third dose can drive antibody levels back up, but the duration is unknown.
Scientists at the University of Nottingham found a plant-based antiviral treatment to be effective in blocking the highly infectious SARS-CoV-2 Delta variant. The novel natural antiviral drug, thapsigargin, was shown to trigger a broad-spectrum host-centred antiviral innate immune response against all variants of the virus.
A new study suggests that unborn babies could contract Covid-19 if their gut is exposed to the SARS-CoV-2 virus. However, researchers say that this risk is extremely limited due to the placenta's protective shield. Vaccination against Covid-19 during pregnancy is still recommended as a way to protect the unborn baby.
A mathematical model suggests that SARS-CoV-2 Delta-like variants, which combine enhanced transmissibility and partial immune escape, will cause more severe pandemics than variants with either trait alone. Vaccination is predicted to be highly beneficial in these cases, preventing more infections and breakthroughs.
A study found that individuals under 65 had higher antibody levels than those over 65, with women outperforming men. However, by six months post-vaccination, antibody levels dropped significantly for everyone in the study group.
A recent study estimates that between 700,000 and 1.6 million US individuals have experienced a lasting loss or change in their sense of smell due to SARS-CoV-2. The analysis suggests that these individuals may be experiencing chronic COVID-19-related olfactory dysfunction.
A new study found that host immunity drives the evolution of the dengue virus, causing it to adapt and change over time. The research, published in Science, analyzed genetic variation and immune signatures of dengue viruses isolated in Bangkok over a 20-year period.
Research team discovered mRNA vaccines induce antibodies recognizing Spike and N protein fragments, potentially leading to misclassified breakthrough infections. The study suggests using multiple viral antigens for accurate detection of vaccine effectiveness.
A new mRNA vaccine, CV2CoV, has demonstrated a ten-fold higher antibody response and significantly improved protective efficacy against COVID-19 compared to the original CVnCoV. The second-generation vaccine induced antigen-specific memory B cell responses and T cell responses in non-human primates.
A study found that long-term exposure to air pollution increases the risk of developing COVID-19 symptoms, especially among older men and those living in poverty. However, no association was found between infection and exposure to air pollutants.
A study of 18 COVID-19 patients found that SARS-CoV-2 damages lung tissue by preventing repair and generating healthy tissue, leading to conditions like diffuse alveolar damage. The data may help develop new therapeutics and inform treatment strategies for high-risk patients.
A retrospective study suggests disulfiram, a treatment for alcoholism, reduces SARS-CoV-2 infection incidence by 34% and COVID-19 deaths by 3%. Further randomized clinical trials are needed to confirm the findings and understand the mechanism of action.
A new vaccine combines the part of the 'spike' protein with a combination adjuvant, inducing full protection in aged mice and potentially equivalent to current mRNA vaccines. The formulation is relatively easy to manufacture and may not require extreme cold storage, enabling its use in more settings.
A large study of UK patients found a significant association between SARS-CoV-2 infection and subsequent psychiatric illness, fatigue, and sleep problems. The research used health records of over 12 million patients to examine the relationship between COVID-19 and mental health issues.
Scientists are using peptide nucleic acids to study SARS-CoV-2 RNA pseudoknots, a crucial mechanism for viral replication and translation. Understanding this process could lead to new methods to disrupt it, potentially leading to more effective treatments.
A new study used machine learning to predict the zoonotic capacity of 5,400 mammal species, identifying those at high risk of transmitting SARS-CoV-2. The model, which combined data on biological traits with ACE2 receptor information, predicted 72% accuracy and identified numerous additional species with potential to transmit the virus.
Researchers found that CD4+ T lymphocytes — immune system cells — produced by people who received COVID-19 vaccines persisted at high levels six months after vaccination, with a significant response against the delta variant. The study also showed that vaccine-elicited fighters recognize and help attack coronavirus delta variant.
A study by Heinrich-Heine University Düsseldorf analyzed viral sequences from Gambia, Ghana, Nigeria, and Senegal, finding distinct patterns of SARS-CoV-2 variants. The researchers believe genetic drift mechanisms, such as the founder effect, may contribute to these variations.
A team of researchers at the University of Cambridge found that an air filtration machine removed almost all traces of airborne SARS-CoV-2 in COVID-19 wards. The study suggests that setting standards for cleaner air could reduce the risk of airborne transmission of infections.
Researchers at Rice University developed a method to decontaminate disposable surgical masks by heating them to 70 degrees Celsius, eliminating 99.9% of the SARS-CoV-2 virus and preserving mask material. The study provides promise for adapting this protocol to future outbreaks.
A multi-center study assesses medicinal mushrooms and Chinese herbs for therapeutic benefit in treating acute COVID-19 infection. The MACH-19 trial evaluates the safety and feasibility of two investigational compounds, one in capsule form and another as a Chinese herbal formula.
A new study reveals that 90% of COVID-19 patient rooms have detectable coronavirus on at least one surface, with the virus persisting days later on TV remote controls and nurse call buttons. Regular cleaning is crucial to prevent spread among vulnerable populations.
A new test can determine the presence of SARS-CoV-2 neutralising antibodies within 10 minutes, allowing for larger-scale screening and mass monitoring. The rapid cellulose pull-down viral neutralisation test has been developed using protein engineering technology and offers quick results with high accuracy.
A study analyzing data from 109 COVID-19 patients found that obesity is the key factor associated with endothelial dysfunction, a condition increasing heart attack and stroke risk. The results suggest an 17% higher cardiovascular risk for obese patients compared to those of normal weight.
Research suggests women with lingering COVID-19 symptoms experience heart rate irregularities during physical exertion, leading to delayed recovery and reduced exercise tolerance. Targeted rehabilitation programs are needed to manage these consequences in women with persistent heart and lung problems.
The BBV152 COVID-19 vaccine demonstrated robust antibody response and induced 77.8% protection against symptomatic COVID-19 in a phase 3 trial. No severe vaccine-related adverse events or deaths were reported among participants.
Researchers investigated the impact of mRNA vaccines on dialysis patients' immunity against Sars-Cov-2 variants. They found that while many produce reactive T cells, protective antibodies are formed less frequently. This immunological memory can be strengthened through vaccination and repeated contact with the pathogen.
A large group of patients with diverse cancer types received two doses of SARS-CoV-2 vaccines or one dose of the Johnson and Johnson vaccine, showing modestly impaired immune responses. Booster vaccine doses enhanced immunity in most patients.
Researchers at East Carolina University have discovered a new way to detect SARS-CoV-2 by testing air passing through building ventilation systems. The method revealed the presence of the virus in air samples with high accuracy, potentially leading to earlier detection and reduced transmission.
Researchers have developed innovative ways to avoid clouds of coronavirus in public waiting lines, classrooms, and live musical performances. Periodic movements in lines can cause aerosol transmission, while heating in winter and air conditioning in summer create 'dead zones' that spread airborne diseases.
A study of 77 lactating parents found a higher prevalence of anti-SARS-CoV-2 antibodies in breast milk among unvaccinated mothers, suggesting potential protection against COVID-19. The study also identified a link between vaccine-induced immunity and increased neutralizing activity in human milk.
A study of nearly 2000 healthcare workers found that being vaccinated against COVID-19 decreased asymptomatic SARS-CoV-2 infection detection compared to unvaccinated staff. Vaccination status was associated with reduced risk of infection.
Researchers have discovered a new target for COVID-19 vaccines that could complement existing vaccines by inducing an immune response against 'replication proteins', essential for the viral cycle. The approach may lead to the creation of a pan-coronaviruses vaccine protecting against SARS-CoV-2 and other coronaviruses.
Researchers found that omitting or altering the buffer solution can generate false positive results, highlighting its essential role in test function. The study's findings have far-reaching implications for public health worldwide, as the rapid antigen test has been distributed to over 120 countries.
A Yale team has discovered an RNA molecule, SLR14, that stimulates the body's early antiviral defense system to protect against SARS-CoV-2 variants. This therapy holds promise as a new class of RNA therapeutics for treating COVID-19 in immunocompromised patients.
Researchers found that levels of chitinase 3-like-1 increase with age and co-morbid diseases, augmenting SARS-CoV-2 infection. A therapeutic antibody blocks the induction of the ACE2 receptor, potentially paving the way for COVID-19 prevention and treatment.
Researchers found that older individuals produce higher levels of protective antibodies after infection or vaccination, providing better defense against emerging variants. Antibodies from infected individuals 50+ years old reacted strongly to the Delta variant, outperforming those from vaccinated adults under 50.
A new study projects that more than eight million tons of pandemic-associated plastic waste have been generated globally, with over 25,000 tons entering the global ocean. The research highlights the need for improved medical waste management in developing countries and calls for global action to reduce plastic pollution.
A French study of nearly 27,000 individuals found that persistent physical symptoms like fatigue and breathlessness after COVID-19 may be more closely tied to beliefs about having been infected than actual lab confirmation. The research suggests a possible psychological component to lingering symptoms.
Researchers developed a human Intestine Chip to study coronavirus infection and test potential treatments. The chip showed that nafamostat reduced virus presence while remdesivir damaged intestinal tissue, offering insights into underlying causes of GI symptoms and improving understanding of treatment efficacy and toxicity.
A process in cells may limit SARS-CoV-2 infectivity, but mutations in alpha and delta variants overcome this effect. GALNT1 enzyme activity reduces furin cleavage, while mutated spike proteins increase it.
Regular testing of asymptomatic healthcare workers identified as cost-efficient strategy to prevent SARS-CoV-2 transmission. The study suggests that desynchronization of teams had limited effectiveness due to economic constraints.
A study at the University of São Paulo found that Torquetenovirus (TTV) titer is higher in people infected by SARS-CoV-2, suggesting it could be a biomarker for COVID-19 severity. TTV load correlates with disease progression and outcome, and its measurement may support diagnosis.
Researchers found a clear link between people's expectations and actual vaccine side effects, suggesting that psychological factors can predict which individuals will experience more symptoms. The study aims to help overcome lingering vaccine hesitancy by reframing the way we think about side effects.
Researchers will identify and track SARS-CoV-2 variants using genomic sequence analyses. The project aims to understand the emergence and spread of the virus in West Virginia, helping public health officials prepare for future outbreaks.
A national survey found that half of US vaccine hesitant individuals believe nothing will convince them to get vaccinated. Most cited concerns about vaccine safety as the reason for their unwillingness.
Researchers at UC San Diego have created a CRISPR-based rapid diagnostic technology that detects SARS-CoV-2, the coronavirus causing COVID-19. The new SENSR system is designed to simplify SARS-CoV-2 detection with a goal of eventual adaptation for in-home use.