Adjuvanted H5N1 influenza vaccine enhances both cross-reactive memory B cell and strain-specific naive B cell responses in humans Immunology and Inflammation

In this study we compared the antibody responses in humans after vaccination with an AS03-adjuvanted versus nonadjuvanted H5N1 avian influenza virus inactivated vaccine. Healthy young adults received two doses of either formulation 3 wk apart. We found that AS03 significantly enhanced H5...
Source: Proceedings of the National Academy of Sciences - Category: Science Authors: Tags: Biological Sciences Source Type: research

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Over the past few years, Professor Zhang Yongzhen has made it his business to sequence thousands of previously unknown viruses. But he knew straight away that this one was particularly nasty. It was about 1:30 p.m. on Jan. 3 that a metal box arrived at the drab, beige buildings that house the Shanghai Public Health Clinical Center. Inside was a test tube packed in dry ice that contained swabs from a patient suffering from a peculiar pneumonia sweeping China’s central city of Wuhan. But little did Zhang know that that box would also unleash a vicious squall of blame and geopolitical acrimony worthy of Pandora herself....
Source: TIME: Health - Category: Consumer Health News Authors: Tags: Uncategorized COVID-19 overnight Source Type: news
Over the past few years, Professor Zhang Yongzhen has made it his business to sequence thousands of previously unknown viruses. But he knew straight away that this one was particularly nasty. It was about 1:30 p.m. on Jan. 3 that a metal box arrived at the drab, beige buildings that house the Shanghai Public Health Clinical Center. Inside was a test tube packed in dry ice that contained swabs from a patient suffering from a peculiar pneumonia sweeping China’s central city of Wuhan. But little did Zhang know that that box would also unleash a vicious squall of blame and geopolitical acrimony worthy of Pandora herself....
Source: TIME: Health - Category: Consumer Health News Authors: Tags: Uncategorized COVID-19 overnight Source Type: news
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Source: Human Vaccines and Immunotherapeutics - Category: Allergy & Immunology Authors: Source Type: research
Timm Harder Avian influenza virus (AIV) remains a huge challenge for poultry production with negative repercussions for micro- and macro-economy and public health in Bangladesh. High (HP) H5N1 and low pathogenicity (LP) H9N2 AIV are currently endemic in poultry, and both have been reported to infect humans sporadically. Multiple virus introductions of different clades of HPAIV H5N1, reassorted genotypes, and on-going diversification of LPAIV H9N2 create a highly volatile virological environment which potentially implicates increased virulence, adaptation to new host species, and subsequent zoonotic transmission. Allo...
Source: Viruses - Category: Virology Authors: Tags: Review Source Type: research
Abstract Influenza A and B viruses cause seasonal worldwide influenza epidemics each winter, and are a major public health concern and cause of morbidity and mortality. A substantial reduction in influenza-related deaths can be attributed to both vaccination and administration of oseltamivir (OS), which is approved for oral administration and inhibits viral neuraminidase (NA), a transmembrane protein. OS carboxylate (OSC), the active form of OS, is formed by the action of endogenous esterase, which targets NA and is shown to significantly reduce influenza-related deaths. However, the development of resistance in v...
Source: Drug Discovery Today - Category: Drugs & Pharmacology Authors: Tags: Drug Discov Today Source Type: research
Highly pathogenic avian influenza virus (HPAIV) subtype H5N1 causes a devastating disease in poultry. Vaccination is an effective method of controlling avian influenza virus (AIV) infection in poultry. The hemagglutinin (HA) protein is the major determinant recognized by the immune system of the host. Cleavage of the HA precursor HA0 into HA1 and HA2 subunits is required for infectivity of the AIV. We evaluated the individual contributions of HA1 and HA2 subunits to the induction of HPAIV serum neutralizing antibodies and protective immunity in chickens. Using reverse genetics, recombinant Newcastle disease viruses (rNDVs)...
Source: Frontiers in Microbiology - Category: Microbiology Source Type: research
Avian influenza virus infections cause significant economic losses on poultry farms and pose the threat of a possible pandemic outbreak. Routine vaccination of poultry against avian influenza is not recommende...
Source: Virology Journal - Category: Virology Authors: Tags: Research Source Type: research
AbstractInactivated (whole-virion, split, subunit, and adjuvanted) vaccines and live attenuated vaccine were tested in parallel to compare their immunogenicity and protective efficacy. Homologous and heterosubtypic protection against the challenge with influenza H5N1 and H1N1 viruses in a mouse model were studied. Single immunization with live or inactivated whole-virion H5N1 vaccine elicited a high level of serum antibodies and provided complete protection against the challenge with the lethal A/Chicken/Kurgan/3/05 (H5N1) virus, whereas application of a single dose of the split vaccine was much less effective. Adjuvants i...
Source: Biochemistry (Moscow) - Category: Biochemistry Source Type: research
Lethal infections by strains of the highly-pathogenic avian influenza virus (HPAIV) H5N1 pose serious threats to both the poultry industry and public health worldwide. A lack of confirmed HPAIV epitopes recognized by cytotoxic T lymphocytes (CTLs) has hindered the utilization of CD8+ T-cell–mediated immunity and has precluded the development of effectively diversified epitope-based vaccination approaches. In particular, an HPAIV H5N1 CTL-recognized epitope based on the peptide MHC-I–β2m (pMHC-I) complex has not yet been designed. Here, screening a collection of selected peptides of several HPAIV strains ag...
Source: Journal of Biological Chemistry - Category: Chemistry Authors: Tags: Immunology Source Type: research
Ajay Kohli Vinay Kohli Chitra Chhabra Kohli By CHITRA CHHABRA KOHLI MD, AJAY KOHLI MD, and VINAY KOHLI MD, MBA With a doubling time of cases estimated between 3 days within the U.S. and about 6 days globally (at the time of this writing) COVID-19 is demonstrating its terrifying virulence as it spreads across the world. What’s perhaps equally terrifying, if not more, is the absence of a known cure or treatment plan for COVID-19. While there has been a lot of attention focused on Hydroxychloroquine and Azithromycin, there has been debate on the scientific validity of these treatment options, either as t...
Source: The Health Care Blog - Category: Consumer Health News Authors: Tags: COVID-19 Patients Physicians Ajay Kohli Azithromycin convalescent plasma therapy coronavirus COVID-19 treatment hydroxychloroquine Pandemic Vinay Kohli Source Type: blogs
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