Well... I had both a flu vaccine and a pneumonia vaccine at the same time on 12/15/22. On 12/26/22 I went to the emergency room because of severe overall stiffness and pain, could barely walk. They admitted me to the neurological department and after 80 some test sent me home in a walker without a resolution. A few weeks later I was diagnosed with PMR and have been on various dosages of Prednisone since. Recently was prescribed Kevzara but awaiting insurance approval. Barely a sick day my entire life prior to 12/26/22 so one can draw their own conclusion.