Table 1.

Types of vaccines used in pigs

Main vaccine category	Subtypes
Whole pathogen	• Attenuated-live
	• Inactivated (killed)
	• Chimeric (attenuated-live or inactivated)
Subunit or vector system baseda	• Prokaryotic (unicellular organisms without a distinct nucleus)  ○Escherichia coli, Bacillus subtilis • Eukaryotic (unicellular or multicellular organisms with an enveloped nucleus)  ○Yeast, mammalian cells, baculovirus expression in insect cells, plants, transgenic animals • Live mammalian virus vectors (replicating or replication deficient)
Nucleic acid based	• DNA plasmid(s) • mRNA

^aVirus-like particles (VLPs) are often produced