Yes, the vax takers are the human trial subjects so some were getting saline ( the parasite class still are). However, they decided it was too important that any person get exposed to a pathogen with a 99.98 recovery rate overall and gave their control (saline/placebo) group the shot, destroying their trial (intentionally, no doubt).

There was a scientist on twitter who explained in a short message how they sabotaged this to prevent any real data. Post if I can find.