Pharmacist Steven Brandenburg, 46, is accused of intentionally omitting 57 vials, which prompted hospital staff to hijack most doses because they thought the vaccine had become ineffective.
Brandenburg, arrested on Thursday, attended a preliminary hearing on his case by video call on Monday. He was subsequently released on bail.
Brandenburg removed a storage container with 57 vials of vaccine at the Aurora Medical Center in Grafton on December 24 and 25, according to police.
A pharmacy technician found the bottles in the early hours of December 26 and put them back in the refrigerator, Aurora Health Care Medical Group president Dr. Jeff Bahr told reporters on Thursday.
Hospital officials used 57 of the 570 doses to vaccinate people, he said.
Sgt. Grafton Police Detective Eric Sutherland said in his statement that Brandenburg “recklessly endangered the lives of these people,” possibly compromising the vaccine’s effectiveness.
But at the virtual hearing held on Monday, Ozaukee County District Attorney Adam Gerol said that extensive testing needs to be conducted on doses that have not been used for vaccines to determine whether Brandenburg’s actions have actually reduced their effectiveness.
“It is not known how long it will take,” said Gerol. “Fortunately, we have them so that – some or all – they can be returned to Moderna for testing.”
Ozaukee County prosecutors accused Brandenburg on Monday of two crimes, which recklessly endanger security and criminal damage to property, according to a police press release. He was not asked to enter an appeal.
But if the tests find that the vaccines are or are still effective, prosecutors can proceed with a less serious charge of attempting criminal damage to property, Gerol said.
Ozaukee County Circuit Court judge Paul Malloy scheduled the next hearing for January 19.
Brandenburg did not speak, except to say that he had no doubts about his bail conditions: handing over his firearms and having no contact with Aurora Health Care Medical Group or any of his former co-workers.
Grafton Police Sgt. Patrick Brock told CNN that Brandenburg was released on bail that requires him to pay $ 10,000 if he doesn’t appear in court.
CNN contacted Brandenburg’s lawyer Jason Baltz, who issued a “no comment” on behalf of his client.
According to the police, the hospital pharmacist reportedly provided Aurora Security Center public officials in Grafton with a written statement last week saying he intentionally removed the vials, knowing that if they were not stored properly, doses would be ineffective.
But during the course of an internal investigation, the former official said the vaccines were removed for a period of time in the early hours of December 24 and 25.
Bahr said 57 vaccines that were given on Saturday are less effective or ineffective, based on new information provided by the pharmacist.
Hospital officials said last week that Brandenburg was no longer working there.
The removal of the refrigeration bottles at the medical center north of Milwaukee, and the subsequent need to dispose of many of them, means that more than 500 doses have been missed, said attorney Aurora Health.
Hospital staff are working with Moderna and the Food and Drug Administration to find a strategy for those who received the 57 doses.
The hospital system did not say how long it had been since the bottles were removed from the refrigerator until they were discovered.
CNN’s Kara Devlin, Kay Jones, Jason Hanna, Dave Alsup, Jennifer Feldman and Andrea Diaz contributed to this report.