Original sentence: Concerns about immunization safety often follow a pattern: some investigators suggest that a medical condition is an adverse effect of vaccination; a premature announcement is made of the alleged adverse effect; the initial study is not reproduced by other groups; and finally, it takes several years to regain public confidence in the vaccine.Medical and scientific evidence surrounding vaccination demonstrates that the benefits of preventing suffering and death from infectious diseases outweigh adverse effects of immunization.Opponents have questioned the effectiveness, safety, and necessity of all recommended vaccines.These arguments have reduced vaccination rates in certain communities, resulting in outbreaks of preventable and fatal childhood illnesses
Edited sentence: Concerns about immunization safety often follow a pattern: some investigators suggest that a medical condition is an adverse effect of vaccination; a  announcement is made of the adverse effect; the initial study may or may not be reproduced by other groups; and finally, it takes several years to regain public confidence in the vaccine.Further, it is of concern that the United States has a very high infant mortality rate especially among full term babies in comparison to other first world nations.In one study that reports to disassociate autism from MMR vaccine there is a sharp increase in autism when there a 1989 increase in MMR dosage in California.It is argued that improvements in hygiene and sanitation contribute to the containment and survivability of many diseases for which there are vaccines.Medical and scientific evidence surrounding vaccination demonstrates that the benefits of preventing suffering and death from infectious diseases outweigh adverse effects of certain immunization schedules.Opponents have questioned the effectiveness, safety, and necessity of many recommended vaccines, especially in comparison to other first world nations.The more immunizations in a country's immunization schedule, the higher the infant mortality rate.The mortality rates correlate with the number vaccinations in each countries' recommended immunization schedule.These arguments have reduced vaccination rates in certain communities, resulting in outbreaks of preventable childhood illnesses.Though Andrew Wakefield's research has been attacked, the case is ongoing.Thus, Dr.Wakefield has not been allowed to fully defend his research in the public forum for which it was attacked and has fifteen other papers still in publication.Wakefield is going against the mainstream thought and is treated the same as others who fought to overcome the same scrutiny such as Galileo and Lister