It's all pretty heady stuff for Kwolek, who came up with Kevlar as a flameproof, ultra-light fiber to reinforce the tread of radial tires â not save lives. At the time, there were fears of a future global energy shortage, and DuPont wanted something that would make tires lighter and cars more fuel-efficient.
Risk Factors. The varicella-zoster virus is responsible for both chickenpox and herpes zoster, but its method of infection is different in both diseases. 1  Both the active varicella and zoster form of the virus can cause chickenpox.2  The shingles virus in its latent (inactive) form is never contagious.eveloping Shingles. Shingles itself can develop only from a reactivation of the varicella-zoster virus in a person who has previously had chickenpox. In other words, shingles itself is never transmitted from one person to another either in the air or through direct exposure to the blisters.
Varicella Pneumonia. Lung infection (pneumonia) caused by the chickenpox virus is an uncommon complication of chickenpox. It develops when the chickenpox virus travels to the lungs. Varicella pneumonia can occur 2 to 10 days after the chickenpox rash.Fever and cough are usually the first signs.Most people recover from varicella pneumonia. Adults who get this condition may become very sick. 2  Varicella pneumonia is the most common cause of death in adults who get chickenpox. 3  Pregnant women. 4  Pregnant women who have chickenpox during the last part of pregnancy are at risk for getting varicella pneumonia, which can lead to severe illness or death.