It’s time to think about your fall flu shot – but don’t stop there. The “Triple Threat” we’ve heard about has to do with the flu season beginning, the upswing in COVID cases and RSV (Respiratory Syncytial Virus) cases rising. Thankfully, we now have available vaccines for all three.

To understand how vaccines work, we need to have a short and, hopefully, simplistic examination of the immune system. The medical world’s understanding of this very complex system is incomplete and continues to evolve. We will look at this amazing phenomenon in two parts.