
Nasal spray vaccine in mice shows potential for broad protection against viruses, bacteria, and allergens
In a mouse study, researchers report a nasal‑spray vaccine that activates both innate and adaptive immunity, protecting against SARS‑CoV‑2 and other coronaviruses, two bacteria (Staphylococcus aureus and Acinetobacter baumannii), and a house‑dust‑mite allergen for at least three months, suggesting a possible universal vaccine pending human trials.













