Original sentence: Although thimerosal containing vaccines (TCVs) are now a minority, many influenza vaccines still contain thimerosal, according to Dr.Modern day critics of vaccination are concerned that childhood vaccination plays a role in autoimmune disease and autism, though large scale scientific studies have failed to find a link.Until recent years, thimerosal was used in many vaccines that contained attenuated pathogens.Vaccination efforts were initially met with some resistance before early success brought widespread acceptance and mass vaccination campaigns were undertaken.Vaccines typically contain one or more adjuvants, used both to boost the immune response
Edited sentence: Although thimerosal containing vaccines (TCVs) have largely been phased out, the "vast majority" of influenza vaccines still contain thimerosal, according to Dr.Evidence-based medicine.The current incarnation of the vaccine controversy has been sparked by concerns over the alleged role of vaccines in triggering what some believe is an autism epidemic.Timeline of vaccines.Until recent years, thimerosal was typically used in most vaccines that did not contain live, but weakened, pathogen strains.Vaccine Adverse Event Reporting System.Vaccine controversy.Vaccines have had a contentious history since being adopted as a standard medical practice in the 19th century.Vaccines typically contain one or more adjuvants, used primarily as preservatives to minimize costs and extend shelf life