Manage swine fever. Pig 8- 1 veterinary vaccine is specially developed for classical swine fever, in which toxic aluminum hydroxide bacteria can effectively inhibit classical swine fever virus. 8- 1 After the veterinary vaccine is diluted according to regulations, intramuscular injection 1 ml is suitable for the first vaccination after 20 days of birth and the second vaccination after 55-60 days. The immune period is about 8 months, and immunity is produced 4 days after injection.