OKLAHOMA CITY (AP) — Oklahoma's deputy health commissioner said Friday that a change in the shipment of the coronavirus vaccines came unexpectedly and has left him frustrated in how to manage distribution of the vaccines, one from Pfizer and one from Moderna.

Keith Reed said he learned Thursday from a contact at Operation Warp Speed that shipments of second, or boost, doses of the vaccine will not be separated from the first, or prime, doses.

Reed said although the doses are identical medically, they were previously being sent as a prime does, then a boost dose, and differentiated as such.

"We...