False about vaccine is -
BCG is the only widely used live bacterial vaccine. The WHO has recommended the 'Danish 1331' strain for production of the vaccine. There are 2 forms- Fresh(liquid) and freeze-dried. Ref: 25th edition, Park's Textbook of Preventive and Social Medicine, Page no. 213
Thiomersal is preservative in DPT vaccine
Kanamycin is preservative in measles
Magnesium chloride stabilizer used in OPV
Neomycin is a preservative in BCG vaccine
Epidemiology