The shake test shown below can be done to know:
Shake test: - Test done to check cold damage to Vaccine due to freezing. - Once the vaccine is frozen, it tends to form flakes which gradually settle to the bottom, after the l is shaken. - Thus, sedimentation occurs faster in a vaccine l which has been frozen as compared to control l. - These ls should be discarded irrespective of their expiry date. - Used for DPT, DT, TT or Hepatitis B
Whether vaccine was exposed to heat
Whether vaccine had been frozen at some point of time in the cold chain
Whether expiry date of vaccine has reached
Whether the vaccine needs to be mixed with normal saline
Storage of vaccines