Air travel after immunization

Asia • Mom of three 💙J Aug '08, 💜 E Aug '14, 💙 T Dec' 19. Wife 💍and eternal partner since Sept '10.

My son is two months old and we just found out my grandmother passed away. He is supposed to get his immunizations this week but I do not want his immune system to weaker during travel because of them. How long after immunization would you feel comfortable traveling? Should I wait until after we get back?