(CNN) Amid a coronavirus outbreak in the United States, the US Centers for Disease Control and Prevention is encouraging older people and people with severe chronic medical conditions to "stay at home as much as possible."

This advice is on a CDC website that was posted Thursday, according to a CDC spokeswoman.

Early data suggests older people are twice as likely to have serious illness from the novel coronavirus, according to the CDC.

A Trump administration official tells CNN that the US Department of Health and Human Services "is in the process of doing targeted outreach to the elderly community and those that have serious underlying health conditions."

The CDC guidance comes as two top infectious disease experts with ties to the federal government have advised people over 60 and those with underlying health problems to strongly consider avoiding activities that involve large crowds.

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