15 minutes
This Moderna Covid vaccine shot is the same as Shots 1 & 2 in a lesser quantity. This shot is 0.25mL vs shots 1 & 2 that are 0.5mL. Your Booster should be at least 4 months from your last Covid vaccine. Your 3rd shot can be for anyone over 18 and your 4th is currently approved for any immune compromised person 18+ or anyone not compromised and 50+.