Asfaw Ayalew

Recent Contributions

Reply to Wearing Mask

March 17, 2016
A drug sensitive PTB patient need not wear a mask,continously.What one needs to do is observe cough etiquette,meaning covering the mouth and nose while sneezing,coughing and speaking. You can use your elbow,tissue paper or a handkerchief for this purpose.

Reply to 'it's time to think seriously about poorly ventilated congregate settings'

Dec. 22, 2015
Dear Levin, I quite understand what you mean.To enrich our discussion,I wish people from WHO head quarters could chip in and express their views on this topic.

Reply to 'it's time to think seriously about poorly ventilated congregate settings'

Dec. 21, 2015
Dear Edward, Thanks again for your scientific & practical elaboration on ventilation dynamics.

Reply to 'it's time to think seriously about poorly ventilated congregate settings'

Dec. 21, 2015
Dears Levin & Edward, I highly appreciate your insightful responses.For Levin,please use this link to get the requested material: http://www.cdc.gov/mmwr/pdf/rr/rr5417.pdf infact,the Sondalo Training Course material quoted this source. Since 2009,WHO has not revised its Guidelines on TB infection control;let us hope the experts will address our concerns alike-when sitting for ...

Reply to 'it's time to think seriously about poorly ventilated congregate settings'

Dec. 18, 2015
Dear Levin, Thank you for the comment.Yes,you are absolutely right in saying extreme weather conditions are not in favor of natural ventilation.We,in the tropics,are at a comparative advantage in this regard. When we come to the numbers behind ACH,there appears to be a scientific evidence. For example, it has been ...


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