Are there any dangers in receiving 2 meningitis vaccinations in a 3-4 year period?

No. There is no danger to being vaccinated again. In fact, revaccination is recommended for persons traveling to countries where outbreaks are occurring. The recommended interval between vaccinations is five years. However, the only problem reported to occur after revaccination is an increase in the frequency of pain and swelling at the site of the injection in a small proportion of people.