1 week history of significantly worsened (previously present "low back strain" lower back pain that had become radicular to both LE and associated with progressively worsening bilateral LE weakness, paresthesias since COVID vaccination last week. see continuation for HPI and assessment/plan from office note 1/13/21  HPI from OV dated 1/13/21  She had presented initially in December 2020 for her annual physical, and we evaluated some low back pain that that time, felt to be a sprain/strain resulting from a fall in the shower earlier December which was aggravated significantly by lifting/transferring a patient at the SNF she works for as a nurse. Presentation at that time was rather benign, no imaging obtained, pt was placed on leave from work for 1 week to avoid the heavy lifting and likely aggravation of back pain, and rx including diclofenac and cyclobenzaprine. She did not FU in the office, but returned to work at SNF a week after I saw her for the back pain. She states she had improved enough to feel like she could go back to work but wasn't 100% without back pain yet. At no time was comp mentioned at the visit in December. She did tell her employer about the injury and was off of work for a week and was encouraged to seek comp. We were never notified.    Yesterday 1/12 she followed up in the office for the back pain and was found to have much more severe pain, now radicular to both LE (pain intensity worse on right), with new neurologic impairment including objective weakness bilateral LE (R>L), sensation disturbance bilateral LE (R>L). Xray of lumbar spine obtained in clinic, this was essentially unremarkable, non-acute.  Pt was sent for stat MRI of the lumbar spine. MRI last night revealed no findings to explain her severe symptoms - she has mild symmetric disc bulging at L5-S1  nd mild bilateral facet arthropathy with patent canal and foramina, and a mild nonspecific  "STIR signal abnormality" within the soft tissues abutting the left lateral aspect of the L5 spinous processes felt to be small and nonspecific. I did discuss the case and the imaging with the radiologist and he feels this is unlikely to be the source of her back pain/radicular symptoms. No obvious signs of apparent discitis or any signficant soft tissue abnormality.    Pt contacted last night with initial "normal" results of MRI as formal results were pending - hydrocodone was sent to her pharmacy for pain relief overnight. Pt received 60mg toradol in the office yesterday during her visit. Pt noted significant improvement in her back pain, bilateral leg pain about 30 minuts after that injection. She continued to have pain in the evening but went to sleep. She woke at 3am unable to roll over due to weakness and pain - her sister gave her a hydrocodone and she went back to sleep' she woke this morning feeling much better; today, she has less severe low back pain, less severe right lower leg radicular pain, NO pain radiating into the left LE, lessening of the weakness in her right LE, lessening of paresthesia reported in the right LE (now isolated just to the heel), resolution of the weakness in the left LE, resolution of the tingling of the left knee. Other than the toradol and one dose of hydrocodone, no other medications were given, no other treatments given since presentation yesterday.   Upon further questioning, patient does reveal that she received the 1st of 2 COVID-19 vaccinations (pfizer) last week. She received the vaccination at work at nursing home on 1/7/21. She had some relatively quick onset nausea and dizziness within an hour of the injection, but that resolved. She recalls feeling like her low back pain, bilateral lower leg pain, leg weakness and paresthesias all intensified sometime either Wednesday 1/6/21 or 1/7/21, but more obviously worsened over the weekend 1/9 and 1/10. Along with the lower extremity symptoms, she does admit today that she experienced soreness in bilateral upper arms starting the day following the vaccine administration, with left arm/shoulder still feeling sore and tender to the touch now. She also developed some altered sensation of the right thumb and index fingers the day following vaccination (1/8/21) and this has been persistent/unchanged. She is right handed. No prior issues with right hand/fingers. Other than the altered sensation, she denies pain, swelling, or notable weakness. She is right handed, and really hasn't done much with her right hand over the past week since she hasn't been working. Patient denies having significant headache, fever, chills, diaphoresis, fatigue, rashes/injection site erythema since the covid vaccination. She was not told to sign up for or told about the V-safe program and hadn't thought to report her symptoms to work or think to be concerned regarding possible vaccine SE. Pt denies prior hx of low back pain, neurologic symptoms including weakness/paresthesias, previous allergy to or adverse reaction to vaccination or injectable medications. She has a history of latent TB(fully treated) but is otherwise in good health.  After gathering much further detailed information/history today from patient, review of chart including the MRI results and xray results from yesterday, my prior OV note, and discussion with radiologist today regarding her MRI - I Discussed with patient and her sister that I believe what is becoming more apparent to me now is that she is likely suffering from an adverse event associated with the COVID-19 vaccination she received on 1/7/21 through her workplace. I'm unable to define this for certain, but I suspect that she developed the progressive worsening of low back pain, development of radicular pain and bilateral LE weakness and paresthesias about 1-2 days following the vaccination administration. She has had notable and rather surprising improvement in both subjective and objective findings  Today as compared to yesterday. Only intervention was toradol 60mg IM and one dose of hydrocodone, she had already been taking diclofenac or ibuprofen so I believe the only explanation for the improvement over the past 24 hours is the fact that she is gradually having resolution of the temporary paraparesis, neuralgia, paresthesia brought on by the recent COVID-19 vaccination. I believe she truly had injury to the low back in December, initial injury at home but had improvmenet and then significant worsening/exacerbation when transferring a resident at work. Her presentation following that was consistent with a strain/sprain of the lumbar spine. This was treated appropriately with rest, activity modification, stretching, NSAID, and muscle relaxers. She returned to work w/o restriction likely earlier than she should have but I believe the covid vaccination is likely what caused her condition to so significantly decline; Its also possible that her physically demanding job requiring lifting/transferring/standing for prolonged periods of time on top of an only partially resolved low back strain had aggravated her low back condition.    plan from OV dated 1/13/21 Given the improvement since yesterday, I recommended obtaining some labs looking for any sign of alternative explanation including infectious etiology or autoimmune/inflammatory condition, however will hold on further imaging as would be the plan, specifically EMG of the bilateral LEs. Explained to patient that I'm hopeful with continued rest and time, her symptoms (weakness, tingling/numbness, radicular back pain) will completely resolve. She may need some eventual PT for the disc bulge in the lumbar spine and lumbar strain that is likely still lingering. Will contact pt with any change in care plan based on the laboratory findings. I would like to closely follow her, and make sure her symptoms continue to slowly improve /resolve. If at any point she develops worsening symptoms again or any new neurologic signs/symptoms (and we discussed what emergency signs/symptoms would be) then she needs to be in touch with me right away. I will work on reporting this suspected adverse covid vaccine reaction to VAERS / possibly also CDC and see if they have any additional input/suggestions for monitoring/treatment.    For pain control, pt may continue with the diclofenac OR ibuprofen, and the hydrococone/APAP as needed for breakthrough severe pain uncontrolled with the NSAID. I have advised pt to remain off of work at this time, resting at home avoiding lots of physical activity as she continues to heal. Suspect will have her follow up in clinic sometime next week for repeat evaluation/examination depending on VAERS/CDC recommendations and of course the lab results and any updated condition reports from the patient in the interim. Will want to make sure she has full resolution of the paresis and adequate resolution of her back pain/radicular pain prior to returning to work, even in a limited capacity. I am informed today that there is light duty available and will keep that in mind. Pt to be contacted regarding follow up. Encouraged to call with questions/concerns/updates. Pt was very thankful for the care.