Two independent teams of scientists may be close to a universal flu vaccine that could work for years or maybe even a lifetime.
Today’s vaccines are the result of educated guesswork on which strains first seen in Asia are likely to be prevalent later in the United States.
That means new vaccines are developed every year and sometimes they are not very effective.
According to studies published in the journals “Nature Medicine” and “Science,” scientists were able to use a different part of the virus to provoke an immune response.
In the first study, a vaccine tested on mice and ferrets found most of the animals were protected when they were exposed to the bird flu.
The second study took a similar approach by creating a stem vaccine. It was reportedly effective in protecting mice.