Pay close attention to your booster dates on a/b...

hep b:
- First Dose: Any time
- Second Dose: 1 to 2 months after the first dose
- Third Dose: 4 to 6 months after the first dose

hep a:
2 doses about six months apart...

at the airport clinic I see people who miss their shot and have to start entire series all over again. Also for a/b get something that is called twinrex vaccine. It is hep a/b combined so you get sticked 3 times instead of 5.

And there is no vaccine for hep c.