4-Day Grace Period

Doses administered up to 4 days before the minimum interval, known as the 4-day grace period, are considered valid.

• If a dose is administered prior to the 4-day grace period, see Appendix C for guidance.

Doses administered at any time after the recommended interval are valid.

Use the 4-day grace period to determine valid doses only when retrospectively reviewing records. Do NOT use the 4-day grace period to schedule appointments earlier than recommended.

Doses administered prior to the 4-day grace period are considered vaccine administration errors and should be reported to VAERS.

Interim Clinical Considerations for Use of COVID-19 Vaccines Currently Approved or Authorized in the United States