What do the approved mRNA vaccines contain?

The mRNA vaccines made by Moderna (Spikevax®) and Pfizer/BioNTech (Comirnaty®) have both been approved for use in Switzerland. The exact compositions of the vaccines are publicly available. Both contain modified and laboratory-produced mRNAs. Various lipids are used to encapsulate the mRNA. And several mineral salts and sugars are used to stabilize the vaccine solution. In contrast to most conventional vaccines, they contain no enhancing agents such as adjuvants.

The exact compositions of the vaccines can be accessed at https://swissmedicinfo.ch/ by entering the search term “Spikevax” for the Moderna vaccine and “Comirnaty” for the Pfizer/BioNTech vaccine.