Speaking for myself (team J&J), single dose is definitely more convenient. Anecdotally, reactions seem to be less severe than for the mRNA vaccines. And, while

Speaking for myself (team J&J), single dose is definitely more convenient. Anecdotally, reactions seem to be less severe than for the mRNA vaccines. And, while it's only a minor speed bump to our gold-plated healthcare delivery system, the fact that it doesn't need an extreme cold chain means it's logistically much easier to handle.