Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Schematic representation of main types of nanoparticles used for vaccine production: (1) VLPs, (2) liposome-based particles [24], (3) nondegradable spherical nanoparticles (for example, metal nanoparticles) [25], (4) polymer nanoparticles [26], (5) graphene nanosheets [27] and nanotubes [28].
