Is the pharmacist obligated to pay for the vaccine order that spoiled due to the negligence of another employee, knowing that she was on leave and was supposed to receive it herself, but it was customary for any employee to receive it?

The questioner guarantees the value of these items because she is legally obligated to spend them herself. So, if they are damaged due to her violation of the rental contract, she is liable for her transgression. She has the right to reclaim what she paid from whoever neglected to safeguard the trust, if the damage was caused by them.