Do not ignore symptoms that may be due to low or high blood glucose. If you have symptoms that do not match the Sensor glucose reading or suspect that your reading may be inaccurate, check the reading by conducting a finger stick test using a blood glucose meter. If you are experiencing symptoms that are not consistent with your glucose readings, consult your health care professional.

If the Sensor is storing glucose readings every 15 minutes, does that mean the user will get the same glucose reading if the Sensor is scanned again within the same 15-minute interval?

No, the user can get an updated glucose reading every minute when they scan the reader over the Sensor.1

Reference

1. FreeStyle Libre flash glucose monitoring system User's Manual.