Do previously infected people still benefit from vaccination against COVID-19?

In a recent study published in PLOS medicine, researchers determined the vaccine effectiveness (VE) of the primary vaccination course for coronavirus disease 2019 (COVID-19). They determined VE against reinfection of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), COVID-19-related hospitalization and mortality. In this way, the researchers assessed the effect of time since vaccination during the … Read more

Myocarditis after COVID vaccination is rare, but more common in younger men

In a recent study published in the Journal of the Canadian Medical Association, researchers observed the incidence of myocarditis after messenger ribonucleic acid (mRNA)-based vaccination against coronavirus disease 2019 (COVID-19). In addition, they compared their estimates to expected rates based on the historical rates assessed before the COVID-19 vaccine rollout in British Columbia (BC), Canada. … Read more

The biological properties of the SARS-CoV-2 E protein in the context of HIV-1

In a recent study published in Retrovirologyresearchers assessed the effectiveness of SARS-CoV (Severe Acute Respiratory Syndrome) and SARS-CoV-2 envelope (E) proteins against human immunodeficiency virus (HIV)-1. Study: SARS-CoV-2 and SARS-CoV envelope proteins potently reduce the infectivity of human immunodeficiency virus type 1 (HIV-1). Image credit: Corona Borealis Studio/Shutterstock Background Viroporins are ion channels expressed by … Read more

Increased incidence and risk of a new diagnosis of diabetes after COVID-19

In a recent study published in the journal BMC medicineresearchers estimate the prevalence of new diabetes after coronavirus disease 2019 (COVID-19). Despite the numerous vaccines and antiviral therapies against severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), the COVID-19 pandemic continues to threaten public health and the economy, with more than 634 million cases and more … Read more

Scientists investigate isolation of bat sarbecovirus in Japan

In a recent study published in Emerging infectious diseasesresearchers conducted bat sarbecovirus isolation experiments using Horned Rhinolophus bats from different regions in Japan that were phylogenetically situated in the same cluster of viruses associated with severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). Study: Isolation of Bat Sarbecoviruses, Japan. Image Credit: Independent Birds/Shutterstock Highly pathogenic human … Read more

How gut microbes influence the immune response to SARS-CoV-2

An article published in Critical Assessments in Food Science and Nutrition journal reviews the role of the gut microbiota in shaping the host immune response to severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). Study: Gut microbiome and antiviral immunity in COVID-19. Image credit: Design_Cells / Shutterstock Background SARS-CoV-2, the causative agent of the 2019 coronavirus … Read more

Comparison of post-COVID-19 symptoms two years after SARS-CoV-2 infection

In a recent study published in JAMA network openedresearchers compared the presence of post-coronavirus disease 2019 (COVID-19) symptoms in hospitalized and non-hospitalized patients in Spain. Study: Post-COVID-19 Symptoms 2 Years After SARS-CoV-2 Infection in Hospitalized vs Non-Hospitalized Patients. Image credit: TZIDO SUN/Shutterstock In addition, the researchers identified potential risk factors associated with developing post-COVID-19 symptoms … Read more

Omicron BA.2 causes more symptoms and greater disruption to daily life

In a recent study published in the Nature communication journal, researchers tracked the changing symptom profiles associated with different variants of severe acute respiratory syndrome CoV-2 (SARS-CoV-2), particularly Omicron subvariants BA.1 and BA.2. Study: Variant-specific symptoms of COVID-19 in a study of 1,542,510 adults in England. ​​​​​​​Image credit: NIAID Background Previous community-based studies have shown … Read more

SARS-CoV-2 antibodies persist in breast milk after two and three COVID-19 vaccine doses

The World Health Organization (WHO) recommends that babies be breastfed for at least the first six months of life and that breastfeeding be continued for two years or more, along with the gradual introduction of complementary foods. Study: Milk antibody response after third dose of COVID-19 mRNA vaccine and SARS-CoV-2 breakthrough infection and implications for … Read more

Vitamin D may reduce the severity and spread of COVID-19

In a recent study published in the Scientific Reports magazine, researchers in the United States assessed the relationship between vitamin D supplementation and 2019 coronavirus disease (COVID-19) and related mortality. Vitamin D deficiency has long been associated with impaired immune function, which can lead to viral infection. In addition, multiple studies have shown that vitamin … Read more