Difficult to say broadly, since there are quite a few different vaccines each with their own ingredient. The biggest difference is probably the lack of ingredie

Difficult to say broadly, since there are quite a few different vaccines each with their own ingredient. The biggest difference is probably the lack of ingredients in the mRNA vaccines. They're incredibly simple and contain basically mRNA, some fat to encase it in, and a few substances that allow it to survive. This article breaks up the ingredients pretty well, although you'll have to scroll down a bit. https://www.msn.com/en-us/health/medical/what-e2-80-99s-in-the-covid-19-vaccines-we-asked-experts-to-explain-the-ingredients/ar-BB1c12ow https://www.msn.com/en-us/health/medical/what-e2-80-99s-in-t...