My son's best friend died of meningitis. About 25 years ago. I'm inclined to say verify the vial have them pop open a brand new one in front of you. I do not have the feeling that these older vaccines are compromised. If I were in your position I'd be very unhappy about the requirement but I would also be very nervous about my son being out among the high-risk herd. Meningitis is dangerous.
My son's best friend died of meningitis. About 25 years ago. I'm inclined to say verify the vial have them pop open a brand new one in front of you. I do not have the feeling that these older vaccines are compromised. If I were in your position I'd be very unhappy about the requirement but I would also be very nervous about my son being out among the high-risk herd. Meningitis is dangerous.