If the date on a single-dose vaccine vial is today’s date, can this vial be used?

The correct response indicates that the vial cannot be used because it expires at the beginning of the date stated on the label. Vaccines and other medical products typically have expiration dates that define the final day they are guaranteed to maintain their safety and efficacy. For single-dose vials, this expiration date is understood to mean that they are viable until the end of the calendar day prior to the expiration date. Hence, once that specific date arrives, the vial is no longer considered safe or effective for administration.

The consideration of storage conditions is significant; however, for the purposes of the expiration date itself, the determination remains tied strictly to that date. It's crucial for healthcare professionals to be vigilant about expiration dates to ensure that patients receive effective treatments.