Washington (CNN) White House officials are expected to ask Congress for emergency funding this week to battle the coronavirus amid growing fears of a larger outbreak in the US, two officials familiar with the forthcoming request said.

Government aides worked throughout the weekend on the supplemental request, which is still not final but could be sent to Capitol Hill as soon as Monday, according to a person familiar with the plans.

That source said Health and Human Services Secretary Alex Azar has ruffled feathers through the process by requesting amounts of money that "have been seen as largely out of proportion." The source noted HHS already has money that could be used for coronavirus issues, but claimed Azar "has been pushing hard for this to overcompensate" for management decisions regarding coronavirus containment that the source criticized.

The US now has 35 confirmed cases of coronavirus. Fourteen Americans who tested positive for the disease returned to the US this week after spending weeks in isolation on the luxury cruise ship Diamond Princess docked in Japan.

A spokesperson for HHS referred questions to the Office of Management and Budget.

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