I just want to add in to this discussion about vaccines--primarily flu shots. In 1976, when I was 21, influenza almost killed me. I had pleurisy, empyema, and collapsed lungs, and lost about 25% pulmonary capacity forever. I was in the ICU for over a month, and my distraught parents were told I would die. However I did not, and after several more months of hospitalization was discharged. For the past 50 years I've had trouble breathing, walking, digesting, and more. I have fairly severe chronic pain. My current breast cancer was most likely caused by the chest X-rays I received. (Lifesaving diagnostics at the time). I've managed to have a fulfilling life with many adventures, career, and family. Yet that bout of flu disabled me for life. It is a rare reaction, but a young healthy person's immune system can turn against them and destroy the lungs. Flu shots were not common at that time. Before they became widely available, I'd get one yearly through my county's public health system. Now I just get one at the drugstore. The rush of gratitude and relief I feel with each inoculation is wonderful. I'm happy to be alive, but I would not wish my experience on anyone, young or old. So just a testimony to vaccines. A sore arm is nothing compared to a harrowing hospitalization. Stay well!