Short Answer 
TSgt Holland should first cover her mouth and nose to avoid inhaling contaminants, then calmly evacuate and warn others about the threat. Finally, she must seek medical attention and cleanse any exposed areas to minimize health risks.
1. Cover Mouth and Nose
If TSgt Holland suspects exposure to a biological agent, her first action should be to cover her mouth and nose. This step is vital to prevent inhaling any further contaminants, which could exacerbate her exposure. Using a cloth or mask can help shield her from inhaling harmful particles in the air.
2. Evacuate and Inform Others
Next, TSgt Holland should calmly evacuate the area without causing panic. While moving to safety, it is important to inform others about the potential threat. This can be done by:
- Shouting warnings without inducing hysteria
- Using direct communication, if possible
- Alerting appropriate authorities once safe
3. Seek Medical Attention
After ensuring her safety and that of others, the last crucial step is to seek medical attention. This is essential for diagnostic evaluation and appropriate treatment. Additionally, she should wash any exposed areas with soap and water to reduce the likelihood of contamination and further health issues.