Sherri Moody, 51, thought she had a cold - then her arms and legs rotted. “I literally saw my wife’s feet and hands die,” says husband David Moody.

After amputations, the Houston teacher still doesn't have prostheses. She has to undergo a complicated operation to combat gangrene on her kneecaps. If this fails, the legs may also have to be amputated above the knee and the prospects of prostheses decrease further.