[M T]

Pfizer and Moderna have fairly short intervals between doses.  If AZ studies suggest that a longer interval may be more effective, I'd want to ask if either Pfizer or Moderna has any evidence one way or the other on any interval other than the 4 week/3 weeks?  

If there were, could the CDC be imagined to allow a longer time between vaccinations in order to get more people with a first dose faster?

Maybe Britain has the idea of getting the first dose in people now and then recommending a second dose 6 months out.

[M T]

Pfizer and Moderna have fairly short intervals between doses.  If AZ studies suggest that a longer interval may be more effective, I'd want to ask if either Pfizer or Moderna has any evidence one way or the other on any interval other than the 4 week/3 weeks?  

If there were, could the CDC be imagined to allow a longer time between vaccinations in order to get more people with a first dose faster?

Maybe Britain has the idea of getting the first dose in people now and then recommending a second dose 6 months out.