{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,2]],"date-time":"2026-05-02T13:18:15Z","timestamp":1777727895483,"version":"3.51.4"},"reference-count":15,"publisher":"SAGE Publications","issue":"7","license":[{"start":{"date-parts":[[2022,7,1]],"date-time":"2022-07-01T00:00:00Z","timestamp":1656633600000},"content-version":"unspecified","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by-nc\/4.0\/"}],"content-domain":{"domain":["journals.sagepub.com"],"crossmark-restriction":true},"short-container-title":["J Int Med Res"],"published-print":{"date-parts":[[2022,7]]},"abstract":"<jats:p>Multifocal motor neuropathy (MMN) is an immune-mediated and acquired demyelinating motor polyneuropathy. Several cases of polyneuropathy associated with severe acquired respiratory syndrome coronavirus 2 (SARS-CoV-2) vaccination have been reported. However, MMN has not been reported as a complication of SARS-CoV-2 vaccination. In this study, we report a case of MMN with progressive muscle weakness following the second dose of the Pfizer-BioNTech mRNA vaccine. It was diagnosed by clinical evaluation and electroneuromyography. SARS-CoV-2 vaccination is increasing rapidly all over the world. Some cases of polyneuropathy, especially Guillain\u2013Barr\u00e9 syndrome, have been reported after vaccination. 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