If she was not part of the study, then she only got the first jab. It takes two jabs to get the full vaccine.
More importantly, no one knows whether the vaccine protects against spreading the virus. The vaccine makers were supposed to get large numbers of test kits from Operation Warped, but did not. By the time the drug makers realized trump had failed miserably, it was too late to procure so many test kits from another source.
We only know the vaccines effects on self reported symptoms. The vaccines could just mask the symptoms, and the vaccinated may still be contagious.
No one is going to be willing to take a placebo, now there is a working vaccine, so getting the information about contagion may take years. trump has failed us on a very basic level.