[mandmandam]

That doesn't take away from the truth of what I said - in fact it's covered at length in the very same link I posted. Sigh

[n4r9]

Your link contained a speculation about the length of time for which vaccinated people are infectious. Mine is a study demonstrating that the chance of transmission to contacts is reduced.

Surely probability of transmission is the key factor determining whether vaccination reduces the spread of the disease?