|Anemia occurs when the blood lacks enough healthy red blood cells which lower the capacity of blood to carry oxygen. Symptoms of this condition are tiredness, weakness, shortness of breath, pale colour of skin. There are more than 400 types of anaemia, among which the most common is Iron-deficiency anemia. The impact factor of journal provides quantitative assessment tool for grading, evaluating, sorting and comparing journals of similar kind. It reflects the average number of citations to recent articles published in science and social science journals in a particular year or period, and is frequently used as a proxy for the relative importance of a journal within its field. It is first devised by Eugene Garfield, the founder of the Institute for Scientific Information. The impact factor of a journal is evaluated by dividing the number of current year citations to the source items published in that journal during the previous two years.