Newborns have immature immune system so they are more susceptible to infections and even they cannot easily respond to vaccines. Hepatitis B vaccine demonstrate to safety and efficacy to newborns. So effective vaccination at birth should be provided. Vaccines given at birth are Bacillus calmette-Guerin, Hepatitis B vaccine, Oral polio vaccine, pertussis vaccine. 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.
Last date updated on July, 2014