Here's the text that went with the picture
"Dr. Mark Katz of the World Health Organization examines an Angolan suspected of having the Marburg virus."
The word "suspected" is what concerns me....
Don't mean to be an alarmist, but it looks like all those people in the background are lined up to be tested. And if that one is suspected of carrying Marburg, then it's safe to assume that all the people being tested are suspected of being carriers?