It's called gallows humor for a reason. It's grim and ironic, and the situation is desperate. Some people say it helps them cope ... yukk it up instead of nutting the fuck up.
My favorite source of ebola-related humor is Tom Frieden, Twerp in Charge of the CDC...the bit about closing the border to travelers from the Hot Zone increasing the risk of an outbreak here just cracks me the fuck up. And the 2nd case in Dallas was due to a "breach in protocol"... and he "knows" this HOW? Squirmy little turd politician pretending to be a scientist....but I guess we've come to expect that.