How often do you need to be vaccinated for hepatitis A?

Related questions

1. Is hepatitis A vaccine free on the NHS?
2. Is it safe to travel to UK?
3. Is vaccination mandatory in the UK?
4. What vaccines are mandatory in UK?
5. How long must passport be valid for UK?
6. What are the mandatory vaccinations?
7. Can EU citizens travel to UK without passport?
8. Which states have mandatory vaccinations?
9. Should I give calpol before Immunisations?
10. How many vaccines does the CDC recommend?

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5. #lasting
6. #least
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20. #apart
21. #should
22. #doses