We are closer to a universal vaccine for cold, flu, Covid, and allergies

US health experts are developing a promising nasal spray vaccine that could protect against respiratory viruses, including cold, flu, and COVID-19, as well as bacterial infections like staph. Initially tested on mice, the vaccine stimulates T cells to enhance immunity without the use of needles. Researchers suggest it may eventually replace seasonal flu and COVID shots, and could offer protection against potential future pandemics, though human trials are still needed.

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