Antibiotics are not vaccines. Antibiotics are used to produce larger animals and to avoid the effort and cost of raising animals in sanitary conditions, withou

Antibiotics are not vaccines. Antibiotics are used to produce larger animals and to avoid the effort and cost of raising animals in sanitary conditions, without much regard for the effects on antibiotic resistance. Vaccines are another matter. Chickens, for example, are routinely vaccinated against Marek's disease without much controversy.