How Safe Are the Nanoparticles in Moderna's Vaccine?

Moderna and Pfizer's COVID-19 vaccines experimental mRNA technology and its lipid nanoparticle-based delivery system have never been approved for use in a vaccine.

Originally published on 2/10/21

STORY AT-A-GLANCE

  • Moderna and Pfizer’s COVID-19 vaccines use lipid nanoparticles that contain polyethylene glycol (PEG) to deliver mRNA to your cells

  • This experimental mRNA technology and its lipid nanoparticle-based delivery system have never been approved for use in a vaccine or drug

  • Significant concerns have been raised ov…

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