If a person is a chimera and has two different blood types in his veins, how does he not die? Shouldn't the immune system attack one of the blood types? In 1953 a human chimera was reported in the British Medical Journal. A woman was found to have blood containing two different blood types. Apparently this resulted from her twin brother's cells living in her body. More recently, a study found that such blood group chimerism is not rare.
The historic Town of Breckenridge is the Home Rule Municipality that is the county seat and the most populous municipality of Summit County, Colorado, United States. The town population was 4,540 at the 2010 United States Census.
Breckenridge Tourism: Best of Breckenridge. Breckenridge, Colorado. Once a mountain mining town decimated and nearly destroyed by river dredging, the surprisingly versatile Breckenridge has bounced back over the last century to become one of Colorado's top year round alpine getaways, with all-seasons activities galore.