 Complete the following phrase:  AVP is administered at primovaccination in three doses with a booster dose after six months. The active ingredient is a sterile filtrate of an alum-precipitated anthrax antigen from the Sterne strain in a solution for injection. The other ingredients are aluminium potassium sulphate, sodium chloride and purified water. The preservative is thiomersal 0.005. The vaccine is given by intramuscular injection and the primary course of four single injections 3 injections 3 weeks apart, followed by a 6-month dose is followed by a single booster dose given once a year. During the 