This means that Hairy cell leukemia, or a subtype of Hairy cell leukemia, affects less than 200,000 people in the US population. Ophanet, a consortium of European partners, currently defines a condition rare when it affects 1 person per 2,000. They list Hairy cell leukemia as a rare disease.
In fact, some of the oldest alphabetic symbols have been found in Central America (2,500 years ago), China (more than 3,000 years ago), and the Middle East (more than 5,000 years ago). One of the earliest forms of the alphabet was hieroglyphics. Hieroglyphics were single symbols that stood for entire words.
The First written language. The first written Greek letters were found on baked mud tablets, in the remains of the Minoan Knossos Palace of Crete island. This language is known as Linear A and it has not been fully decoded till today. The most famous example of Linear A is written in the famous Phaestos Disc. In the 12th century BC, a new language started to develop, called Linear B, where each drawing symbol is a consonant-vowel combination. Linear B dates from the Mycenaean civilization.