>Honestly I don't know how she can be that confident that timing of the second dose doesn't matter, since this doesn't seem to have been tested with COVID vacci

>Honestly I don't know how she can be that confident that timing of the second dose doesn't matter, since this doesn't seem to have been tested with COVID vaccines. Perhaps it is a feature of vaccines in general? Given that this is a completely novel vaccine, and there is zero clinical data to support that statement, there is literally no way she can know that for sure. However, the Moderna vaccine confers an immunity approximately equivalent to convalescent COVID-19 patients within two weeks of the first dose, so she's probably fine.