State health officials have ordered tens of thousands more doses of COVID-19 vaccines.

The Maine Center for Disease Control and Prevention has placed an order for 17,075 vaccine doses with federal authorities, the state Department of Health and Human Services said Thursday.

The order is the fifth in a series of vaccine requests that state officials will file in the coming weeks and represents the maximum number of doses available to Maine for new vaccines, the agency said.

The order is expected to arrive early next week and will comprise of 8,775 doses from Pfizer and 8,300 doses from Moderna.

Combined with prior orders, Maine expects to have enough doses to vaccinate about 81,850 people in the first four weeks of distribution, officials said.