The flu virus mutates every year and there are many different strains of flu virus. If you are in the “at risk” group of people you’re required to take a flu shot every year / every flu season. This can be very cumbersome, so scientists are working on developing a universal flu vaccine that would be active against all strains of the virus and you wouldn’t need inoculations every year. Promising research published in Science Express journal, demonstrates how the team of scientists at the Crucell Vaccine Institute at the Janssen Center of Excellence for Immunoprophylaxis in the Netherlands (and other research centres in the US), have extracted different antigens from most flu virus and placed them in the vaccine to mimic the flu virus and stimulate the immune response to produce antibodies in defence, and also keep in memory different types of flu virus, so in the future, dealing with the virus is easier and less burdensome on the victim. Final results of the study have developed two different flu vaccines which could potentially offer broader protection against a variety of flu strains than current vaccines. But since this has only been tested on animals, we’ll have to wait and see the response in humans in future research.