The cadre of elite disease detectives at the Centers for Disease Control and Prevention is expected to be left in ruin today as the Trump administration continues to slash the federal workforce.

Many members of the CDC's Epidemic Intelligence Service, EIS—a globally revered public health training program—were informed earlier Friday that they were about to be fired, according to reporting from Stat News. Multiple sources told CBS News that half of EIS officers are among the ongoing cuts.

The Trump administration is ousting thousands of probationary federal workers in a wide-scale effort to dramatically slim agencies.

The EIS is a two-year program filled with competitively selected, highly educated and trained experts. EIS officers are the ones deployed in critical public health situations, such as deadly outbreaks or bioterror attacks. The program has a long, rich history since its establishment in 1951, which includes contributing to the eradication of smallpox, among other achievements.