The dwindling funds reflect an uptick in spending as the White House in recent months has labored aggressively to battle back the rise of the omicron variant. While top officials say they are confident in their ability to weather the latest surge, they have started to explore whether more money might be needed to protect the public against any future variants.

“We will never let funding get in the way of our covid response, and remain in touch with Congress on resources needed to ensure we stay ahead of the virus and move toward the time when covid won’t disrupt our daily lives,” according to an official at the Office of Management and Budget.

The issue is captured in documents that the Biden administration privately has shared with congressional lawmakers, which The Washington Post obtained on Thursday. Two people familiar with the documents confirmed their details, speaking on the condition of anonymity to describe them.

In total, the figures focus on roughly $350 billion earmarked specifically at the Department of Health and Human Services since the start of the pandemic in 2020. That includes funding under President Donald Trump and the more recent provision of $80 billion as part of the $1.9 trillion American Rescue Plan that President Biden signed into law last spring.