A communication problem between the Pennsylvania Department of Health and vaccine providers has resulted in hundreds of thousands of doses being administered to the wrong people – first doses instead of seconds.

That’s good news for the many people who were partially covered earlier than they should have been, but the problem could reportedly result in people having to wait an additional two weeks for their second dose – and the increased coverage offered by the full vaccine.

During a press briefing Wednesday, Acting Secretary Alison Beam said “some providers inadvertently used the Moderna vaccine shipped to them intended as second doses… as first doses.”

“This was a structural issue that started out in the beginning of January,” Beam said. The total number of doses is about 200,000.