incorrect.  Vaccines are usually more of a hit or miss.  If they include the correct strains you are exposed to, you will most likely not get any sense that you were exposed to it.  If they include strains that are similar, you might get  mild symptoms.  If you are exposed to a very different strain, then the fly shot may provide ZERO protection/attenuation to the flu infection.  I found out I got the 'miss' vaccine as I contracted a full blown flu infection and the vaccine provided zero attenuation - it was a completely different strain than what was contained in the vaccine.