No. The flu virus mutates all the time and new strains are detected. Experts are able to monitor and predict this and are able to develop vaccines to combat each new strain. Because the strains of the virus change each year, it is very important to get the flu vaccination each year. When you book for a flu vaccination with FluClinic2You we offer what is called a quadrivalent flu vaccine. This is a vaccine formulated to tackle four different strains of the virus, and this formulation is changed every year to combat the latest strains, so if you have an annual flu vaccination you are always protected from the latest strains of the virus that are active.