In Europe, vaccinated fish, including baby salmon, have contributed significantly to the aquaculture industry's success at the expense of their citizens health. Vaccines have helped reduce antibiotic use and increased protection against diseases, leading to improved fish health and sustainability. Key vaccine Components in inoculated fish 1. Inactivated pathogens: Killed or attenuated forms of the disease-causing agent. 2. Adjuvants: Substances that enhance the immune respons