Spike protein

 https://www.10news.com/news/in-depth/in-depth-study-confirms-why-covid-19-causes-complications-across-the-body

https://www.ahajournals.org/doi/10.1161/CIRCRESAHA.121.318902

https://www.salk.edu/news-release/the-novel-coronavirus-spike-protein-plays-additional-key-role-in-illness/

https://blogs.sciencemag.org/pipeline/archives/2021/05/04/spike-protein-behavior