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Delaware now has six presumptive positive cases of coronavirus after health officials announced two more cases on Saturday.

All six individuals are associated with the University of Delaware and linked to Delaware's first known positive case identified earlier this week, officials said.

The latest two cases involve a woman older than 50 and a man older than 60, both from New Castle County. Both are self-isolating at home and epidemiologists are working to identify anyone who has been in close contact with them, health officials said.

More:Governor orders Delaware schools to close for two weeks in response to coronavirus outbreak

The state Division of Public Health "is working closely with the CDC, hospitals, clinicians, and other medical providers to proactively identify and respond to any possible cases of COVID-19. We will continue to keep the public fully informed as additional information becomes available,” division director Dr. Karyl Rattay said in a prepared statement.

The newest cases come as President Donald Trump has called a state of emergency for the nation.

The House of Representatives passed legislation Friday for relief for those impacted by coronavirus. It was supported by Trump and would call for free testing for those who wanted to be tested, two weeks of paid leave for workers affected by the pandemic and benefits such as food stamps.

Delaware announced late Friday that all public schools will be closed for two weeks.

More:University of Delaware to close all residence halls amid coronavirus concerns

New Castle County libraries will be closed starting Monday, and sporting and entertainment events have been canceled or postponed. By limiting events and large gatherings, officials are trying to avoid a rapid spike of cases that could overwhelm the health care system.

Experts are encouraging quarantines, even involving people who are less vulnerable, as a means to limit the spread of the virus to vulnerable populations.

Contact Ira Porter at 302-324-2581 or iporter@delawareonline.com