[sdrawkcabmai]

The data suggests a regularly scheduled set of boosters over time?

Is this because the vaccines are short acting? Is it because they are not targeting the virus properly? Or is this because of virus mutations?

If we had better vaccines targeted to the current mutations, would they require so many boosters?

When will we get a new vaccine that is targeted more to the current mutations circulating?

[cacois]

In the end its going to be very much like influenza. We get yearly flu shots primarily because the flu is different variants every year, and secondarily because over time immunity lowers.

[fullstop]

I think that it's both -- immunity is not permanent and, while still effective, the vaccine is not as effective against delta.