The U.S. Department of Agriculture is trying to reverse the firing of some employees who were involved in responding to the nation’s growing bird flu outbreak, officials said this week.

The US Department of Agriculture last week issued a conditional license for an avian flu vaccine for use in chickens, as an outbreak of a newer variant ravages poultry flocks, contributing to the sky high price of eggs.

The Agriculture Department is scrambling to rehire several workers it fired as part of President Donald Trump’s broad cuts because they were involved in the government’s response to the ongoing bird flu outbreak that has devastated egg and poultry farms over the past three years.