They exposed themselves to the virus they were studying.
Oh. Yep, they probably very much wish that, too.
However, the news I posted isn't about health-care workers who got ebola in Africa and, once noticeably sick, were medevacced to the US under biowarfare-level precautions.
This is about a normal person taking a normal passenger flight (full of other passengers) from Liberia to the US. Then, after being being here with family and interacting with people for 6 days, feeling ill enough to go to the hospital, and -- get this -- being admitted only 2 days after that, finally to find out that he or she has ebola.
This is a whole different league.