PORTLAND, Ore. (KOIN) — Oregon health officials said the federal government is giving them fewer doses of the Pfizer vaccine next week than they were originally expecting.

They expected to get 40,950 doses the week of Dec. 20, but will now only receive 25,350 doses. They will then receive 48,750, the week of Dec. 27.

“While this news is certainly disappointing, we also recognize that the vaccine is in extremely short supply, and that such adjustments are needing to be made from time to time,” an Oregon Health Authority spokesperson said.

The CDC told OHA that they made the reduction to ensure regular allocations moving forward, and to do so had to reduce initial allocations and redirect those doses to later weeks.

The state is expected to receive 35,100 doses in total this week. Legacy Health, Oregon Health & Science University and Kaiser Permanente and Saint Alphonsus have already received a total of 4,875 doses and began administering the vaccine on Wednesday.

Oregon’s largest health care provider, Providence, received its first 2000 doses of the Pfizer vaccine on Thursday. They intend to begin vaccinating Providence caregivers on Friday.

A panel of outside advisers to the U.S. Food and Drug Administration on Thursday endorsed emergency use of Moderna Inc’s coronavirus vaccine, virtually assuring a second option for protecting against COVID-19 for a pandemic ravaged nation.

When the Moderna vaccine receives the FDA emergency use authorization, Oregon expects to receive 71,900 doses the week of Dec. 20 and 31,700 doses the week of Dec. 27. 

Oregon plans to vaccinate 100,000 healthcare workers by the end of the year.