Here's some information concerning the dangers of handling victims of cyanide poisoning without proper protection:
Avoid touching a person whose skin has been exposed to cyanide; only emergency personnel with special protective clothing should have direct contact with the victim, as secondary contamination is possible.
Cyanide Poisoning Treatment: First Aid Information for Cyanide Poisoning
Persons whose clothing or skin is contaminated with cyanide-containing solutions can secondarily contaminate response personnel by direct contact or through off-gassing vapor.
Hydrogen Cyanide Hospital Management
Persons whose clothing or skin is contaminated with cyanide-containing solutions can secondarily contaminate response personnel by direct contact or through off-gassing vapor.
ATSDR - Medical Management Guidelines (MMGs): Cyanide
Hospital staff working in an enclosed area can be secondarily contaminated by cyanide vapor off-gassing from heavily soaked clothing or skin, or from toxic vomit. Avoid dermal contact with cyanide-contaminated victims or with gastric contents of persons who may have ingested cyanide-containing materials (patients usually don't pose secondary contamination risks after contaminated clothing is removed and the skin is washed.
Emergency Response Handbook for Chemical and Biological Agents and Weapons ... - John R. Cashman - Google Books
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If cyanide gas/dust is suspected;
Do not enter the area
Contact Emergency services on (0) 000 from a Monash phone or 112 from a mobile
Call security on 333
Double glove to avoid contamination from patient’s skin/clothes
If patient is conscious;
Administer medical oxygen at maximum rate
Remove contaminated clothing and place in biohazard bag labeled "Contaminated with Cyanide" until it can be decontaminated
Wash all contaminated skin with copious amounts of water for at least 20 minutes Continue treatment until medical assistance arrives
First aid for cyanide poisoning - OHS information sheet - Monash University
I hope this helps you to understand why there is a problem with the eyewitness accounts of Hoss and the testimonies of members of the Sonderkommando units who speak of going into the gas chamber bare-handed and handling so many freshly gassed bodies for eight months without falling ill.
Ever hear of a book called "Inside the Gas Chamber: Eight Months in the Sonderkommando of Auschwitz"? It was written by a man named Venezia in collaboration with Béatrice Prasquier.
In the book he says:
". . . their job was to work barehanded and separate intertwined bodies, some of whom may have been relatives or spouses.”
"In general, the men who filled out the ranks of the Sonderkommando led short lives. The Germans, not wanting their genocidal activities to become common knowledge, routinely murdered entire Sonderkommando units and refilled them with new prisoners. Venezia survived only due to the chaotic evacuation of Auschwitz in January 1945. He recalled that during the forced evacuation to Austria, SS troopers periodically wandered through the marching prisoners asking whether anyone had worked at Auschwitz in the Sonderkommando. He wisely kept silent, knowing that he would be shot immediately if identified."
H-Net Reviews
Apparently, the biggest concern for members of the Sonderkommano units was the prospect of being shot, since they were somehow magically immune to the effects of Zyklon B even as they entered gas chambers and handled freshly gassed corpses barehanded for
eighteen months.
So, why do you believe they were immune to the effects of cyanide?
Shlomo Venezia. Inside the Gas Chambers: Eight Months in the Sonderkommando of Auschwitz. In collaboration with Béatrice Prasquier. Cambridge: Polity, 2009. xv + 202 pp. $22.95 (cloth), ISBN 978-0-7456-4383-0. Reviewed by Jeff Rutherford (Department of History, Wheeling Jesuit University)...
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