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  "path": "/news/2026-04-flu-covid-variants-immune-defenses.html",
  "publishedAt": "2026-04-13T21:00:01.000Z",
  "site": "https://medicalxpress.com",
  "textContent": "We're keeping an eye on new influenza and SARS-CoV-2 viral variants. Here's what we know about those viruses—and your immune system's ability to fight back.",
  "title": "New flu and COVID variants spread, but immune defenses still blunt severe disease"
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