“What Are Pfizer's Lipid Nanotechnologies? mRNA technology has been researched and developed for around 40 years but never passed the FDA’s safety and efficacy standards for human use; not until August 23 of last year. When the FDA approved Pfizer’s mRNA-based COVID-19 vaccine this was a turning point establishing mRNA as a technology; a technology that was approved as a vaccine”

https://karenkingston.substack.com/p/what-are-pfizers-lipid-nanotechnologies?utm_medium=email