The World Health Organization has issued a situation assessment entitled ‘What we know about transmission of the Ebola virus among humans‘. WHO is rather late entering the transmission discussion which began on 12 September 2014 with the suggestion that Ebola virus transmission could go airborne. WHO is a big organization and moves slowly; nevertheless their voice may reassure those who are not convinced by what virologists have to say. Here are the salient pointsÂ (voiced here and byÂ many others in the past few weeks).
The Ebola virus is transmitted among humans through close and direct physical contact with infected bodily fluids, the most infectious being blood, faeces and vomit.
Ebola virus disease is not an airborne infection. Airborne spread among humans implies inhalation of an infectious dose of virus from a suspended cloud of small dried droplets.
This mode of transmission has not been observed during extensive studies of the Ebola virus over several decades.
Moreover, scientists are unaware of any virus that has dramatically changed its mode of transmission*. For example, the H5N1 avian influenza virus, which has caused sporadic human cases since 1997, is now endemic in chickens and ducks in large parts of Asia.
That virus has probably circulated through many billions of birds for at least two decades. Its mode of transmission remains basically unchanged.
Speculation that Ebola virus disease might mutate into a form that could easily spread among humans through the air is just that: speculation, unsubstantiated by any evidence.
The last sentence is the key point:
To stop this outbreak, more needs to be done to implement â€“ on a much larger scale â€“ well-known protective and preventive measures. Abundant evidence has documented their effectiveness