evidence: Hundreds of millions of COVID-19 vaccine doses have been administered safely in the United States in the last six months. There is no evidence to indicate that the spike proteins generated by human cells following vaccination are a toxin or that they circulate in the body and damage tissues, contrary to what a Canadian virus immunologist recently claimed. All of the COVID-19 vaccines currently approved in the United States are designed to instruct human cells to make harmless spike proteins — mimicking a viral protein that’s used by the SARS-CoV-2 virus to enter cells. When the immune system recognizes the proteins, which aren’t normally there, it starts generating antibodies and building an immune response against them. The process prepares the body against future infection. [...] There is no evidence that the spike protein in vaccines "is toxic or that it lingers at any toxic level in the body after vaccination," an FDA spokesperson told us in an email.