The National Department of Health said it was expecting a total of 588,000 doses of the AstraZeneca vaccine before the end of June 2021 from the first allocation.
The vaccine will be shipped to PNG in two shipments, the first with 288,000 doses is expected to arrive sometime between the end of March to April.
The remaining 300,000 doses should arrive between May and June of this year.
The department says these vaccines will be used to vaccinate health care workers and other frontline essential workers that constitute 3% of the total population with the initial allocation of vaccine by the end of June.
This will be followed by the most vulnerable, including those with underlying medical conditions, and older persons in the second half of the year.
The tentative date of the vaccination will be at the end of April or the beginning of May.
The department, with support from the World Health Organisation, is now preparing to receive the AstraZeneca vaccine.