There are scenarios where a practices likes to send VIS documents on vaccines the patient will be receiving at the next visit. 

Within the system the Global Setting should be set to 'Auto send VIS Documents to Patient Portal: Send on Scheduled and Administered'. 

Then, within a patient's chart open the Immunization module, select the immunization(s) the patient will be receiving and click 'Schedule'

Within the Schedule Immunization pop up the user can add Notes and select a date for when the patient will receive the vaccine, then click Save.

At this step the VIS documents will be available to the patient in the Portal

The Scheduled vaccine will show in the chart tree. When the patient returns, the user can click the arrow to quickly drop in the vaccine to be administered.