Safety study of 23-valent pneumococcal polysaccharide vaccine in Hebei Province / 公共卫生与预防医学

Objective To analyze the occurrence characteristics of adverse events following immunization (AEFI) of 23-valent pneumococcal polysaccharide vaccine (PPSV-23) in Hebei Province and to evaluate the safety of the vaccine. Methods AEFI cases related to vaccination of PPSV-23 in Hebei Province from January 1, 2020 to December 31, 2022 were collected through the AEFI surveillance module of Chinese Center for Disease Control and Prevention Information System. The incidence of reported AEFI cases were then analyzed and compared. Results The reported incidence rate of AEFI of PPSV-23 was 56.12 /100,000 doses, and the incidence rate of adverse reactions was 55.50 /100 000 doses. The incidence rate of common adverse reactions was 53.94/100 000 doses, and the incidence rate of rare adverse reactions was 1.56/100 000 doses. Most of the reported AEFI cases caused by PPSV-23 were common adverse reactions, which occurred mainly within one day after vaccination, and the overall regression was positive. Conclusion The 23-valent pneumococcal polysaccharide vaccine used in Hebei Province is safe，but its safety monitoring still needs to be strengthened.

Analysis of the safety surveillance data of adverse events following immunization with varicella atten-uated live vaccine in Hebei province, 2012-2014 / 中华微生物学和免疫学杂志

Objective To analyze the characteristics of adverse events following immunization ( AEFI) with varicella attenuated live vaccine ( VarV) in Hebei province during 2012—2014, to evaluate the safety of VarV and to provide supportive evidences for planning chicken pox prevention and control strate-gies in Hebei province.Methods The AEFI data associated with VarV in Hebei province during 2012 to 2014 were collected from the national AEFI information management system and were analyzed by using the method of descriptive epidemiology.Results A total of 239 cases reported during 2012 to 2014 were col-lected from the national AEFI information management system, with a male to female ratio of 1.44 ∶1.The estimated incidence rate was 25.51 per 100 000 doses.One case was serious AEFI with an incidence rate of 0.11 per 100 000 doses.Most of the AEFI cases were children under 3 years old and identified in scattered inhibiting children and kindergarten kids.The main symptoms of common vaccine reactions were fever, local swelling and induration .The rare vaccine reactions were presented as anaphylactic rashes .Conclusion The reported incidence rate of VarV associated AEFI in Hebei province was less than expected.However, the estimated incidence rate of common vaccine reactions in Hebei province was higher than that showed on the Analysis on Surveillance Data of Post-marketing Immunization Safety for Varicella Attenuated Live Vac-cine in China, 2010—2012.Attentions to the AEFI after immunization with VarV should also be paid in fu-ture.