[rossdavidh]

Interesting! Looks like you're right about that: https://www.modernatx.com/covid19vaccine-eua/providers/stora...

I have read that J&J also had a two-dose phase 3 going in parallel, but because the one-dose worked well enough they dropped it.

Really, given the shortage of vaccines in the world, and the fact that the U.K. essentially ran a 12-week one-dose experiment on a massive scale, I would think that we have enough data now to make the call. But, everything is more complicated than it seems from afar, so I am sure they have reasons.

[rossdavidh]

Although it does look to me like J&J is a bit less demanding in regards refrigeration; it never requires below freezing storage: https://www.cdc.gov/vaccines/covid-19/info-by-product/jansse...

But still you're right, Moderna does not require anything all that exceptional.