I have assumed that MSF's experience with relatively few infected caregivers while treating many EHF patients was the best argument for absence of close range airborne transmission, because I have not heard of MSF advocating airborne/respiratory precautions. To further investigate this, I would like to hear more about what MSF is actually able to do on the ground. Are they using N95 respirators? Are they fit testing? Or, are they in practice using masks of variable efficiency and fit?
I've looked at the MSF 2007 and 2008 documents found on the web (see posts under recent discussion of 2nd US nurse infected for links). In the 2007 document under "Quality and Requirements for Protective Equipment" on page 293 it states that masks should be "Preferably HEPA-filtration, minimum N95". No mention of fit testing is made in the document. It does say that "edges should seal well to the face." On page 58-59 it states that "The use of respiratory masks with full beards is not recommended, as an effective seal around the mask is impossible to achieve. High Efficiency Particulate filtration (HEPA) masks are preferred." Thus, the documents available to me suggest that they are trying to do some airborne/respiratory protection -- but maybe not as assiduously as they do standard and droplet spray precautions.
Can anyone shed light on the MSF practices and supplies?