NEW YORK — Health Secretary Robert F. Kennedy Jr.’s motto is “Make America Healthy Again,” but government cuts could make it harder to know whether that’s happening.

More than a dozen data-gathering programs that track deaths and disease appear to have been eliminated in the tornado of layoffs and proposed budget cuts rolled out in the Trump administration’s first 100 days.

The Associated Press examined draft and final budget proposals and spoke to more than a dozen current and former federal employees to determine the scope of the cuts to programs tracking basic facts about Americans’ health.

Among those terminated at the Centers for Disease Control and Prevention were experts tracking abortions, pregnancies, job-related injuries, lead poisonings, sexual violence and youth smoking.

“If you don’t have staff, the program is gone,” said Patrick Breysse, who used to oversee the CDC’s environmental health programs.

Federal officials have not given a public accounting of specific surveillance programs being eliminated.

Instead, a Department of Health and Human Services spokeswoman pointed the AP to the White House’s budget proposal released Friday. It lacked specifics but proposes to cut the CDC’s core budget by more than half and vows to focus CDC surveillance only on emerging and infectious diseases.

Kennedy has said some of the CDC’s other work will be moved to a yet-to-be-created agency, the Administration for a Healthy America. He also has said the cuts are designed to get rid of waste at a department that has seen its budget grow in recent years.

“Unfortunately, this extra spending and staff has not improved our nation’s health as a country,” he wrote last month in The New York Post.

Yet some health experts say the eliminated programs are not duplicative.

“If the U.S. is interested in making itself healthier again, how is it going to know, if it cancels the programs that helps us understand these diseases?” said Graham Mooney, a Johns Hopkins University public health historian.

The core of the nation’s health surveillance is done by the CDC’s National Center for Health Statistics.

Relying on birth and death certificates, it generates information on birth rates, death trends and life expectancy.

It also operates longstanding health surveys that provide basic data on obesity, asthma and other health issues. The center has been barely touched in layoffs, and seems intact under current budget plans.