White blood cell the complete blood count. The normal white cell count is usually between 4 × 10/L and 1.1 × 10/L. In the US, this is usually expressed as 4,000 to 11,000 white blood cells per microliter of blood. White blood cells make up approximately 1% of the total blood volume in a healthy adult, making them substantially less numerous than the red blood cells at 40% to 45%. However, this 1% of the blood makes a large difference to health, because immunity depends on it. An increase in the number of leukocytes over the upper limits is called leukocytosis. It is
U2 Live at Red Rocks: Under a Blood Red Sky U2 Live at Red Rocks: Under a Blood Red Sky U2 Live at Red Rocks: Under a Blood Red Sky is a concert film by Irish rock band U2. It was recorded on 5 June 1983 at Red Rocks Amphitheatre in Colorado, United States, on the group's War Tour. Originally released in 1984 on videocassette, "U2 Live at Red Rocks" was the band's first video release. It accompanied a 1983 live album entitled "Under a Blood Red Sky", on which two tracks from the film appear. The video was directed by Gavin Taylor and produced by Rick Wurpel and Doug