[pablodavila]

I was planning on getting the J&J because I will most likely only be able to get one dose. Is a single dose of the mRNA vaccines effective in any meaningful way?

[Trasmatta]

Yes, perhaps around 80% effective after one dose of mRNA: https://www.cnbc.com/2021/03/29/cdc-study-shows-single-dose-...

[jghn]

It has similar efficacy as the single dose J&J