CDC page admits the mRNA makes the spike protein in the COVID-19 vaccine. https://www.cdc.gov/coronavirus/2019-ncov/vaccines/different-vaccines/overview-COVID-19-vaccines.html?CDC_AA_refVal=https%3A%2F%2Fwww.cdc.gov%2Fcoronavirus%2F2019-ncov%2Fvaccines%2Fdifferent-vaccines%2FModerna.html and https://archive.is/9rFbk
Below is a screen shot of that page that tells you. But the spike protein is not harmless. It’s super toxic.
In an effort at convincing family, friends, and acquaintances that the mRNA drugs/vaccines work by changing your DNA, this really helps!