The pathogen, Mycobacterium tuberculosis, can spread easily in the air and infect those with weakened immune systems. Moreover, once the infection has begun, it can be almost impossible to treat. As a result, the potential for high loss of life grows. To ensure this doesn't happen, the key is to do a proper risk assessment of the patient, including determining medical history. If the pathogen is suspected, the patient needs to be treated in the same way as someone with Ebola in isolation. Only when the bacterium is ruled out can the patient return to the normal ICU environment.