Vaccines are used to prevent many of the common pig diseases, resulting in far fewer treatments with medication. Vaccines are used to prevent such things as E. coli, pneumonia, abortion and acute diseases affecting the whole pig such as circovirus, PRRS virus and erysipelas. It is far better for the animal to prevent these sicknesses than to treat them after the fact. They are not RNA vaccinated.
Vaccination programs, again under the direction of a veterinarian, and better farm management have substantially reduced the need for antibiotics or other medications.