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We interact with nanoparticles in multiple ways every day. The nanoparticles in this illustration are delivering drugs to cells. (Shutterstock)

The nanoparticles in mRNA vaccines are nothing to fear: We interact with many useful, tiny particles every day

Some vaccine hesitancy is based on a fear of the nanoparticles used in mRNA vaccines. But humans have been interacting with nanoparticles for millennia, and we use nanotechnology-based devices every day.

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