Patient/caregiver was instructed regarding flu vaccine as follows: Flu vaccines are given to protect against influenza group of viruses. Influenza viruses rapidly mutate and change. The influenza viruses responsible for flu this season could be different from the viruses rampant in the previous season. As newer strains of influenza viruses emerge every year, newer versions of the vaccines are manufactured too to control the spread of influenza for that current season. Also, as the viruses [...]