Proficiency Testing of Inactivated COVID-19 Vaccine
OBJECTIVE To evaluate the testing capability of the vaccine quality control laboratories and vaccine manufacturer laboratories which participated in the proficiency testing of pH,osmotic pressure molar concentration and aluminum content of inactiva-ted COVID-19 vaccine.METHODS Samples of inactivated COVID-19 vaccine were tested for uniformity and stability by F-test and t-test,and then distributed to participating laboratories by cold chain transportation.The abilities of the participating laboratories for determination of pH,osmotic pressure molar concentration,and aluminum content were evaluated by Z ratio.RESULTS A total of 30 laboratories across the country participated in this proficiency testing,and the pH and aluminum content assessment results were all satisfactory,while the osmotic pressure molar concentration results of two laboratories were unsatisfactory.After participating in meas-urement audits,satisfactory results were obtained.CONCLUSION The provincial vaccine quality control laboratories,and vaccine production enterprises participating in this proficiency testing have good testing capabilities and quality control levels.
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