Publications by authors named "Y Yahata"

Background: Japan lacks an established framework for routine seasonal influenza vaccine effectiveness (SIVE) assessment at the national and municipal levels. This study aimed to estimate SIVE among older adults using an innovative population-based administrative database linking medical fee claims data with vaccination records, while also exploring its potential bias.

Methods: In this retrospective population-based cohort study, we assessed SIVE against medically attended influenza during the 2017/18 season among older adults aged ≥65 years in a Japanese city.

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Article Synopsis
  • A study in Japan examined pediatric patients aged 0-19 who died from SARS-CoV-2 infection between January and September 2022, identifying 62 cases and analyzing detailed medical information from 53 of those patients.
  • Of the patients with internal causes of death, 15% were infants under 1 year old, 59% had no underlying health conditions, and 88% of those eligible for vaccination had not been vaccinated.
  • Key findings showed that 46% experienced out-of-hospital cardiac arrest, nonrespiratory symptoms were more prevalent than respiratory symptoms, and the primary suspected causes of death were central nervous system and cardiac abnormalities; the study emphasizes close monitoring of pediatric patients in the week following symptom onset
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  • Epoxy fatty acids were formed when heating triolein (OOO) and trilinolein (LLL), with different types identified in each: epoxy octadecanoic in OOO and epoxy octadecenoic in LLL.
  • The longer the heating time, the more epoxy fatty acids were produced, with trans-epoxy types being formed much more than cis-epoxy types.
  • When antioxidants like α-tocopherol were present during heating, the creation of epoxy fatty acids was found to be reduced.
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Introduction: Concentrated growth factor (CGF) is a new-generation autologous platelet concentrate that promotes tissue regeneration and has anti-inflammatory properties. This randomized multicenter trial aimed to evaluate the effects of CGF on bone healing in combination with root-end microsurgery.

Methods: Healthy adult patients indicated for root-end microsurgery were randomly assigned to either the CGF or control (no CGF implantation) groups.

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A foodborne outbreak related to milk cartons served in school lunches occurred in June 2021, which involved more than 1,800 cases from 25 schools. The major symptoms were abdominal pain, diarrhoea, vomiting, and fever. Although major foodborne toxins and pathogens were not detected, a specific strain, serotype OUT (OgGp9):H18, was predominantly isolated from milk samples related to the outbreak and most patients tested.

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