How nanotech works in COVID-19 vaccines

This is a new technology.

Source:

• 
  December 1, 2020. Elizabeth Cooney. “How Nanotechnology Helps MRNA Covid-19 Vaccines Work.” STAT.
  https://www.statnews.com/2020/12/01/how-nanotechnology-helps-mrna-covid19-vaccines-work/.
  Research Journal, Magazine.