2) This systematic review including 14 prospective studies found no significant association between influenza vaccination and reduced risk of COVID-19 infection, hospitalization, or death.
3) Meta-analysis showed influenza vaccination was not protective against SARS-CoV-2 infection (SRR 0.95, 95%CI 0.81-1.11) or hospitalization/mortality due to COVID-19 (hospitalization: SRR 0.90, 95%CI 0.68-1.19; mortality: SRR 0.83, 95%CI 0.56-1.23).
4) Prospective data provided robust evidence that influenza vaccines did not directly reduce COVID-19 burden of disease.
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2) The authors report the detection of HPAI H5N1 virus in nasal swabs and milk of dairy cows. They isolated eight HPAI A(H5N1) viruses from milk samples and compared their genetic origin with other viruses.
2) The receptor-binding motif (RBM) in the spike protein plays an important role in SARS-CoV-2's ability to infect humans by binding to the ACE2 receptor. Understanding the evolution of this motif is crucial to tracing the virus's origins.
3) Early in the pandemic, it was proposed that the RBM came from a pangolin coronavirus via recombination. However, a study challenged this, finding the RBM of RaTG13 bat coronavirus actually originated via recombination, making the pangolin RBM appear closer to SARS-CoV-2.
2) The authors detected avian influenza subtype H5 RNA in wastewater samples from treatment plants in Texas and North Carolina that showed increases in overall influenza A virus RNA in March-April 2024.
This time period coincided with reported outbreaks of ...
3) ... highly pathogenic avian influenza H5N1 circulating in dairy cattle in those regions.
They developed a new RT-PCR assay to specifically detect the H5 hemagglutinin gene and applied it retrospectively to wastewater samples
2) Highly pathogenic avian influenza H5N1 virus was detected infecting dairy cattle herds in several states in the U.S. in early 2024, representing the first report of H5N1 in a livestock species.
3) Affected cattle displayed clinical signs like decreased appetite, respiratory distress, diarrhea, decreased milk production, and abnormal milk. Virus was detected in milk, nasal swabs, blood, and tissues of infected cows.
2) An outbreak of acute hepatitis of unknown etiology in children was reported globally in 2022. In Israel, 39 HUO cases were identified and 20 samples were tested. Human herpesvirus 6 was detected in 11/19 (58%) samples by PCR or serology, making it the most common finding.
3) Adenovirus and adeno-associated virus 2 were less frequent. Most children had past COVID-19 exposure. The unusual coincidence of multiple viral triggers during the pandemic may have induced liver inflammation.
2) Highly pathogenic avian influenza H5N1 was detected in US dairy cattle herds in 2024, spreading between states and infecting at least one worker. Assessments found unpasteurized milk from infected cows contained high levels of infectious H5N1 virus.
3) To understand virus exposure risks to dairy workers during milking, the persistence of H5N1 and surrogate H1N1 influenza viruses were examined in unpasteurized milk on surfaces found in milking equipment like rubber inflation liners and stainless steel.