公式だと、中和抗体ができたかどうかの検査は、
今のところ合計8人についてしか結果が出ておらず、
かつ、その8人全員について中和抗体を確認できたとある。

At this time, neutralizing antibody data are available only for the first four
participants in each of the 25 µg and 100 µg dose level cohorts.
Consistent with the binding antibody data, mRNA-1273 vaccination elicited
neutralizing antibodies in all eight of these participants,
as measured by plaque reduction neutralization (PRNT) assays against live SARS-CoV-2.
The levels of neutralizing antibodies at day 43 were at or above levels
generally seen in convalescent sera.
https://investors.modernatx.com/news-releases/news-release-details/moderna-announces-positive-interim-phase-1-data-its-mrna-vaccine/