• Scientists create universal nasal spray vaccine that protects against COVID, flu, and pneumonia A single nasal spray vaccine may one day shield us from viruses, pneumonia, and even allergies â all at once. • - Date: - February 23, 2026 - Source: - Stanford Medicine - Summary: - Scientists at Stanford Medicine have unveiled a bold new kind of âuniversalâ vaccine that could one day protect against everything from COVID-19 and the flu to bacterial pneumonia and even common allergens. • Instead of targeting a specific virus or bacterium, the nasal spray vaccine supercharges the lungsâ own immune defenses, keeping them on high alert for months. • In mice, it slashed viral levels, prevented severe illness, and even blocked allergic reactions. • - Share: For decades, scientists have chased the idea of a universal vaccine capable of protecting against virtually any infectious threat. • That goal has often seemed almost mythical.

Article Summaries:

  • Scientists at Stanford Medicine have developed a nasal‑spray vaccine that, in mouse studies, protected against a broad spectrum of respiratory threats-including SARS‑CoV‑2, other coronaviruses, bacterial pneumonia pathogens (Staphylococcus aureus, Acinetobacter baumannii), and the house‑dust mite allergen. The vaccine boosts the lungs’ innate immune defenses, providing protection that lasts for months. If similar efficacy is seen in humans, one shot could replace multiple seasonal vaccines and offer rapid defense against emerging pandemics. The work, published in Science on Feb. 19, represents a significant step toward a universal respiratory vaccine.
  • Scientists create universal nasal spray vaccine that protects against COVID, flu, and pneumonia A single nasal spray vaccine may one day shield us from viruses, pneumonia, and even allergies â all at once. - Date: - February 23, 2026 - Source: - Stanford Medicine - Summary: - Scientists at Stanford Medicine have unveiled a bold new kind of âuniversalâ vaccine that could one day protect against everything from COVID-19 and the flu to bacterial pneumonia and even common allergens. Instead of targeting a specific virus or bacterium, the nasal spray vaccine supercharges the lungsâ own immune defen

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