Pfizer-BioNTech & Moderna are mRNA (messenger Ribonucleic Acid) coronavirus vaccines.

They give instructions for our cells to make a harmless piece of what is called the “spike protein” found on the surface of the virus that causes COVID-19.

https://www.cdc.gov/coronavirus/2019-ncov/vaccines/different-vaccines/mrna.html

Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is virus behind worldwide outbreak of COVID-19 disease. One of the key biological characteristics of SARS-CoV-2 is the presence of spike proteins that allow these viruses to penetrate host cells. https://www.news-medical.net/health/What-are-Spike-Proteins.aspx

Messenger RNA (mRNA) is a type of small molecule that tells your cells how to assemble a specific protein by putting together building blocks (called amino acids) in a certain order.

As workhorses of the cell, proteins compose structural and motor elements in the cell, and they serve as the catalysts for virtually every biochemical reaction that occurs in living things.
Proteins are built from a set of only twenty amino acids.
https://www.nature.com/scitable/topicpage/protein-structure-14122136/

the mRNA message: you need to make this spike protein, and here’s how. As the vaccinated immune system cells start churning out the spike protein, other immune system cells realize that the protein should not be there. That’s when the battle begins.
https://nyulangone.org/news/how-mrna-vaccines-prevent-covid-19

@SandyDarity
VIDEO: Dr. Aisha Langford explains how the mRNA vaccine platform helps the body’s immune system safely build up protection against COVID-19.
https://nyulangone.org/news/how-mrna-vaccines-prevent-covid-19