Oh, maybe it's the Medium paywall. But here's a friend link in case it might be useful to you: https://shinjieyong.medium.com/concerns-of-lipid-nanoparticle-carrying-mrna-vaccine-into-the-brain-what-to-make-of-it-42b1a98dae27?sk=dcc637826b31b81cb2e4d0728fd3a066

Thank you too for your kind comment :))