<prompt> MgCl2 is added to polio-vaccine because of the followingPotentiates the vaccineVaccine can be kept in higher temperaturePreservativeNone  <response>: Vaccine can be kept in higher temperature 491- A7th Molar MgCl2 protects the virus against heat inactivation Poliovirus is resistant to ether, chloroform, bile protelytic enzymes of the intestinal contents and detergents It is stable at PH-3 It is readily inactivated by heat 55degC for 30 minutes Chlorination destroys the virus in water, but organic matter delays inactivation Phenolic disinfectants are not effective Poliovirus does not survive lyophisation well 