...
The Dosage, Units, and Lot Number are required fields, as is the VFC Eligibility status (follow the link to be taken to the CDC site article that reviews VFC Eligibility). The other fields may be optional, but we strongly recommend that you review each field and complete them to the best of your ability. Once the required fields are entered, you can click the "Done" button to add the Immunization record to the patient's file.
...