I was asked this question by one of my infection control practitioners. We started offering the flu vaccine the first week of October and some have delayed getting the shot for fear that immunity will not last the season. She pointed me to this NPR article, “Yes, It Is Possible To Get Your Flu Shot Too Soon,” as driving the fear of too little too soon.
So when should you get the flu shot?
Short answer – I don’t know.
There are multiple variables that make it a difficult question to answer. When does flu season start? When does it end? Influenza has immunologic variation from year to year and different strains circulate each year. How good is the match between the circulating strains of influenza and the vaccine? How good is the immunologic response of the host?
So many questions. By answering these question maybe we can come up with an estimated optimal time to receive the flu vaccine. (more…)