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.
Chickenpox is caused by the varicella-zoster virus. It can spread easily. You can get it from an infected person who sneezes, coughs, or shares food or drinks. You can also get it if you touch the fluid from a chickenpox blister.A person who has chickenpox can spread the virus even before he or she has any symptoms.Chickenpox is most easily spread from 2 to 3 days before the rash appears until all the blisters have crusted over. You are at risk for chickenpox if you have never had the illness and haven't had the chickenpox vaccine.hickenpox is caused by the varicella-zoster virus. It can spread easily. You can get it from an infected person who sneezes, coughs, or shares food or drinks. You can also get it if you touch the fluid from a chickenpox blister.