Yeah do it. Even if you had the shot immunity wears off. Where I'm from they gave out only 1 when I was young whereas the recommendation is now 2. There's is

Yeah do it. Even if you had the shot immunity wears off. Where I'm from they gave out only 1 when I was young whereas the recommendation is now 2. There's is absolutely no danger in having an extra shot if you can't find out how many you had.