Four pediatric patients were given incorrect vaccines this week at Kadena Air Base, Okinawa, according to the 18th Medical Group.

“As soon as the error was discovered, clinic staff contacted the parents to ensure the health and well-being of their children and address any questions or concerns,” the Kadena Medical Clinic announced Friday on its official Facebook page.

The post, which placed limits on who could comment, did not say which vaccines had been incorrectly administered or whether any of the affected children had adverse reactions.

“We are unable to provide additional details due to the ongoing investigation and to avoid the disclosure of protected patient safety information,” an unnamed spokesman from Kadena’s 18th Wing wrote Wednesday in response to queries emailed over the weekend.

The 18th Medical Group limited Facebook comments to “encourage patients to call the clinic directly, avoiding potential delays in response on social media,” the message said.

“In our ongoing efforts to provide the highest quality healthcare, we are investigating this event and will make necessary adjustments as we strive to offer safe and effective healthcare to our community,” the clinic’s post said.

The post asked those with questions, comments or concerns to contact the Kadena Clinic Patient Advocate at DSN 315-630-4146 or the Healthcare Resolutions Specialist at DSN 315-646-7005.