A "universal vaccine" in the form of a nasal spray that can block viruses, bacteria and allergies is discovered

Scientists from Stanford University and other institutions in the US have developed a nasal spray that is being described as a kind of "universal vaccine", capable of protecting the body from various viruses, bacteria and allergens.
In animal tests, the experimental vaccine GLA-3M-052-LS+OVA has shown very promising results. Researchers found that it reduced the viral load of COVID-19 by up to 700-fold and accelerated the immune system's response from about two weeks to just three days.
In addition to protecting against viruses, the spray was also effective against dangerous bacteria that often spread in hospitals, such as Staphylococcus aureus, and reduced inflammatory asthma reactions caused by dust mites for up to three months.
This approach works by linking the body's immediate immunity with a long-term defense system, keeping the respiratory immune system alert to various threats. This creates a broader shield than traditional vaccines, which usually target only one virus or a specific variant.
However, the next step is human trials to confirm safety and avoid an overreaction of the immune system. According to the researchers, if all goes according to plan, this innovative treatment could be available to the public within 5 to 7 years.