Since the COVID-19 pandemic swept across the world more than two years ago, more than 4.5 billion people worldwide have become fully vaccinated against it. Now more and more people are concerned that the spike proteins used in the vaccines and present in the virus are the cause of long COVID syndrome.
The spike protein, also known as the S protein, is the largest structural protein in the SARS-CoV-2 virus, which causes COVID-19. It’s a signature structure that protrudes from the surface of the virus, creating the crown-like shape that coronaviruses get their name from. Corona is Latin for “crown” or “wreath.”
