I am a healthy 51 year old and suspect the same. All of my shots were Moderna until the last one which was Pfizer. I feel that my immune system is in overdrive. I got a booster 4/28/22, had Covid in mid June, and another booster 10/9/22 (plus the flu shot). I asked my PCP if I should get the bivalent booster in October sine I would be traveling and attending crowded events at my son's university. She said yes. In early November, my symptoms began with chest squeezes (everything checked out ok by cardiologist), and the day before Thanksgiving I got extreme cold sensations that spread down my neck into my arms. Since then I have had numerous symptoms on almost a daily basis to include cold sensations, sunburn feeling, pins and needles tingling, numbness, and aches from my neck down. Each day the symptoms can be different and in random areas of my body. Sometimes I also feel a heaviness throughout my body, which may be anxiety. I feel best when exercising or moving around. An MRI, tests for lupus, RA, lymes, and sjogrens were all negative. Thyroid and Vitamin D levels are fine. My B-12 was low, but after taking supplements has vastly improved. I obviously have some form of neuropathy. The low B-12 may have contributed, but this came on so suddenly that I feel something else is in play. My neurologist is moving so I need to move forward with a new one.