From the Research
You can receive the yellow fever vaccine at the same time as the meningococcal vaccine or at any time after receiving it, as there is no required waiting period between these two vaccines. This is because the meningococcal vaccine is an inactivated vaccine, and the yellow fever vaccine is a live attenuated vaccine, and they work through different immune mechanisms and don't interfere with each other's effectiveness 1.
The study by 1 found that the immunogenicity and safety of typhoid fever and yellow fever vaccines were not compromised when administered concomitantly with a quadrivalent meningococcal glycoconjugate ACWY-CRM vaccine. Another study by 2 also found that the immunogenicity of the yellow fever vaccine was unaffected when coadministered with a meningococcal A conjugate vaccine at 9 months of age.
However, if you're planning international travel requiring these vaccines, it's best to get them at least 10-14 days before departure to allow your body time to develop immunity. If you have specific health conditions or are immunocompromised, consult with your healthcare provider as they might recommend a different approach based on your individual health status.
Some studies have suggested that the immune response to live attenuated vaccines like yellow fever may be affected by the administration of other vaccines, but the current evidence suggests that this is not a significant concern for the meningococcal and yellow fever vaccines 3, 2.
In terms of safety, the studies have shown that the coadministration of these vaccines is safe and well-tolerated, with no significant increase in adverse events 1, 2.
Overall, the evidence suggests that there is no required waiting period between the meningococcal and yellow fever vaccines, and they can be administered at the same time or at any time after receiving the other vaccine.