How long does Hep A and B vaccine last?

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Tags

1. #administered
2. #shown
3. #adequate
4. #persons
5. #provide
6. #healthy
7. #least
8. #years
9. #vaccine
10. #hepatitis
11. #international
12. #before
13. #antigen
14. #known
15. #single
16. #lasts
17. #travel
18. #protection