(May 2012). Varicella zoster virus or varicella-zoster virus (VZV) is one of eight herpesviruses known to infect humans and vertebrates. VZV only affects humans, and commonly causes chickenpox in children, teens and young adults and herpes zoster (shingles) in adults and rarely in children.May 2012). Varicella zoster virus or varicella-zoster virus (VZV) is one of eight herpesviruses known to infect humans and vertebrates. VZV only affects humans, and commonly causes chickenpox in children, teens and young adults and herpes zoster (shingles) in adults and rarely in children.
A manufacturing bottleneck is a constraint or choke point that limits production output. Many manufacturing operations suffer from bottlenecks caused by one or more machines and the bottleneck may change depending upon the actual product being manufactured.
A bottleneck is congestion but congestion is often more than a bottleneck. The FHWA  Traffic Congestion Reliability  reports define congestion as an excess of vehicles on a roadway at a particular time resulting in speeds that are slower-sometimes much slower-than normal or free flow speeds.mong Webster's dictionary definitions of bottleneck are i) a narrow or obstructed portion of a highway or pipeline, and ii) a hindrance to production or progress. Certainly the elemental roots of a traffic bottleneck exist in these descriptions; namely, the narrow portion of highway and the hindrance to progress.