2.1 Search Strategy
The online literature search was conducted by two independent authors
(FN and XC) from electronic databases including PubMed, Embase, and Web
of Science from January 01, 2020, to December 31, 2022. The following
sets of keywords were used for searching: Neuroimmune disorders, Central
Nervous System Demyelinating Diseases, Multiple Sclerosis, Neuromyelitis
Optica Spectrum Disorders, Myasthenia Gravis, Peripheral Nervous System
Disease, chronic inflammatory demyelinating polyneuropathy combined
using the operate ‘AND’ COVID 19 Vaccines, SARS Coronavirus 2 Vaccines
or Vaccination. (The detailed search strategy is provided in
Supplementary Table 1.) The eligible titles were combined and
non–English-language titles and duplicates were removed. The titles and
abstracts were then reviewed by two reviewers (FN and XC) independently.
Full texts were screened after the preliminary screening of relevant
titles and abstracts. Ambiguity was resolved after a discussion with a
third reviewer (ZR).