#2406: Viral Vector Immunity explain

[A large wooden horse statue on wheels stands before a city wall, upon which are standing several warriors who are shouting and brandishing spears.]

Warrior 1: Look! It’s a statue of that horrible animal that trampled Steve!

Warrior 2: Burn it!

Warrior 3: Smash it!

Warrior 4: Push it into the gorge!

[Caption below the panel:]

How vaccine failure due to viral vector immunity works