{
  "id": 13201525,
  "title": "T-cell research reveals paths to better vaccines for COVID-19 and beyond",
  "url": "https://urgent.news/2026/10/09/t-cell-research-reveals-paths-to-better-vaccines-for-covid-19-and",
  "topic": "health",
  "section": "Health & Medicine",
  "published": "2026-10-09T20:20:01.000Z",
  "source": {
    "name": "Medical Xpress",
    "slug": "medical-xpress",
    "url": "https://medicalxpress.com/news/2026-10-cell-reveals-paths-vaccines-covid.html"
  },
  "original_language": "en",
  "account": "Two individuals infected with the same COVID-19 strain can experience vastly different outcomes, ranging from no symptoms to severe illness. Researchers are investigating the role of T cells, a type of white blood cell that mounts an immune response, particularly CD8+ T cells that can fight off COVID-19 infections. However, most studies have not accounted for individual variations in the immune system. Moriya Tsuji, a professor at Texas A&M University School of Engineering Medicine, emphasized the importance of considering human leukocyte antigens (HLAs), which help determine how the immune system recognizes viral pieces and activates T cells. HLA types vary among individuals, and understanding these differences can guide treatment and vaccine development. Tsuji and his team analyzed blood samples from 42 HLA-A2-positive patients, all of whom carried the same HLA type. They identified that patients with mild COVID-19 had more CD8+ T cells, which mounted a strong, multifunctional response lasting up to four months. In contrast, severe disease patients exhibited dysfunctional T-cell types, suggesting a weakened immune response. Tsuji highlighted that many virus targets recognized by CD8+ T cells remain unchanged across variants, as they are located within the virus rather than on its surface. By comparing CD8+ T cell responses from mild versus severe patients in a controlled manner, the study provides valuable insights into potential T-cell-based vaccines. Further research will aim to establish a direct causal relationship between these T-cell responses and protection, paving the way for next-generation COVID-19 vaccines that can mitigate the virus's ability to mutate.",
  "summary": "Two people infected with the same strain of COVID-19 can have vastly different experiences. One might never even sniffle, and the other might end up on a ventilator. But why?",
  "key_points": [],
  "editors_take": null,
  "illustration": null,
  "coverage": {
    "outlets": 1,
    "also_reported_by": []
  },
  "ai_generated": true,
  "disclaimer": "Summaries, key points and the editor’s take are written by software from other outlets’ reporting and may contain errors — always check the linked original."
}