Increasing evidence that it can be spread by airborne means, droplets too fine to be stopped or diverted by a medical grade mask and which can linger in the air for minutes. However, an N95 spec respirator would stop it.
I've thinking of dusting off my old 80's NATO respirator. I'm sure i've got some bio agent cartridges for it. The more we find out about this nasty bug the more alarming it becomes.