Scientists test universal vaccine for cold, flu, Covid and allergies

The world is a significant step closer to a universal vaccine for cold, flu, Covid and allergies, scientists believe. Experts at Stanford Medicine ⁠in the US have developed a universal ⁠vaccine that could be given as a nasal spray and ⁠could protect against a wide range of respiratory viruses, bacteria and allergy triggers. Although the study, published in the journal Science, was in mice, they said the vaccine offered broad protection in the lungs for several months. Vaccinated mice were...