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Good question, Jessica. No idea how quickly the virus tends to enter cells upon contact. Because mucous membranes are so thin and moist, it probably happens much to quickly there for any external treatment to stop it. But as for hands, I imagine that there still is a chance to wash off the virus with its infectious medium before it penetrates the skin.

Here is the current cdc guidance:
http://www.cdc.gov/vhf/ebola/hcp/infection-prevention-and-control-recommendations.html
“Key Components of Standard, Contact, and Droplet Precautions Recommended for Prevention of EVD Transmission in U.S. Hospitals […] Hand hygiene in healthcare settings can be performed by washing with soap and water or using alcohol-based hand rubs. If hands are visibly soiled, use soap and water, not alcohol-based hand rubs.”

For providing consistently safe PPE to as many people as possible, the number of steps for acquisition and use need to be kept at the absolute necessary minimum. Adding more links to the chain makes it more likely that SOMETHING goes wrong. Better to fly in some industrial product that works than to create something locallywhich MAY work, if you get everything right.

Since the situation is already out of hand, the focus must be on the most efficient and effective measures, e.g. ensuring strict domestic hygiene:

https://openideo.com/challenge/fighting-ebola/research/let-s-not-neglect-the-basics-must-watch-ted-talk-by-myriam-sidibe-the-simple-power-of-hand-washing

Hi Howard, a similar idea came to me a few times, too, but I refuted it because of the following problems:
• latex preparation = more complicated and time-consuming than using manufactured PPE
• difficult to get the mixture and texture right, ensuring that it results in a strong, even and complete cover and preventing crumbling / abrasion / fissures
• Even if a workable recipe and application method is found, it would be an immense logistical challenge to ensure people stick to it
• If ineffective (e.g. because ingredients were not available in their right proportions), the body cover could create a dangerous false sense of security!
• time-consuming to put on and peel of, at least no quicker than a manufactired rubber overall would be
• peeled-off crumbles cannot be picked up and disposed of in one piece, unlike pre-made PPE
• ingredients heavier and possibly more difficult to acquire than manufactured PPE