Perhaps this will clarify things for you:
"Police in Wisconsin said on Thursday evening that they had arrested a hospital employee who was fired after being suspected of intentionally spoiling hundreds of doses of the Covid-19 vaccine."
"...after a health center in the state said an employee admitted to deliberately spoiling 500 doses of the coronavirus vaccine."
On Wednesday Aurora medical center said the doses appeared to have been spoiled deliberately.
"A pharmacist at the suburban medical center deliberately removed hundreds of coronavirus vaccine doses from refrigeration and left them out overnight – twice, not just once as officials had initially believed, the health system’s chief medical officer said later on Thursday."
"“This was a situation involving a bad actor, as opposed to a bad process,”
Investigation launched after medical centre says worker admitted leaving 500 doses out of refrigeration
www.theguardian.com