<prompt> Which of the following statements about vaccines is NOT TRUE?Thiomersal is preservative in DPT vaccineMagnesium chloride is stabilizer used in OPVKanamycin is preservative in measlesNeomycin is preservative in BCG vaccine  <response>: BCG vaccine contains a live attenuated strain derived from Mycobacterium bovis. It does not contain thiomersal or any other preservatives. It contains live organisms that have been attenuated. Traces of antibiotics like neomycin is used as a preservative in varicella, polio virus IPV, MMR vaccines. Ref: Immunisation Against Infectious Diseases edited by David M. Salisbury, Mary Ramsay, Karen Noakes, 2006, Page 394. 