Tips To Boost Your Immune System during Cold and Flu Season October begins cold and flu season. Every year at this time of the year, the CDC begins their drumbeat to promote the yearly flu shot to everyone 6 months old and older.  The CDC.gov website reports that the 2016-2017 flu vaccine will protect against only 3 types of flu viruses.  Only a few paragraphs later, the CDC states "Flu viruses are constantly changing so it's not unusual for new flu [...]