Fish & shellfish immunology;Oncology & cancer medicine;Veterinary medicine & immunology;Fish diseases & therapy;Flow cytometry;Experimental animal;Animal welfare;Epilepsy;Porcine Reproductive and Respiratory Syndrome;PRRS Virus;Betaarterivirus Suid 1;Porcine Epidemic Diarrhea Virus;Coronavirus;Transmissible Gastroenteritis Virus;