Is that the exact analogy he used? Because that would be perfect, as it was studies done upon chickens that initially highlighted the dangers of leaky vaccines (meaning they don't stop transmission, which resulted in more and more virulent variants developing to account for the leaky vaccine's "protection").

Is that the exact analogy he used? Because that would be perfect, as it was studies done upon chickens that initially highlighted the dangers of leaky vaccines (meaning they don't stop transmission, which resulted in deadlier and deadlier variants developing to account for the leaky vaccine's "protection").