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| Surveillance on allergic rash associated with vaccination in Huzhou City |
| QIAN Xiaoping1, LUO Xiaofu2, LING Jian1
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1. Department of Immunization Planning, Wuxing Center for Disease Control and Prevention, Huzhou, Zhejiang 313000, China;
2. Huzhou Center for Disease Control and Prevention, Huzhou, Zhejiang 313000, China |
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Abstract Objective To investigate the incidence of allergic rash associated with vaccination in Huzhou City from 2017 to 2021, so as to provide insights into the prevention and control of allergic rash. Methods Data pertaining to cases with vaccination-related allergic rash in Huzhou City from 2017 to 2021 were captured from the National Adverse Events Following Immunization Surveillance System of Chinese Disease Control and Prevention Information System, and epidemiological characteristics, vaccination and clinical features of allergic rash were analyzed. Results Totally 324 allergic rash cases were reported in Huzhou City from 2017 to 2021, with an annual reported incidence of 6.12/105 doses. The incidence of allergic rash was 6.40/105 doses among men and 5.82/105 doses among women, and allergic rash predominantly occurred among cases under 1 year, with a reported incidence of 8.32/105 doses. The largest number of cases was reported in the second quarter (108 cases, 33.33%), and the largest number of cases was reported in Deqing County (92 cases, 28.40%) with a reported incidence of 11.52/105 doses. The highest reported incidence of allergic rash was seen following immunization with combined live-attenuated measles-mumps-rubella vaccines (41.23/105 doses). There were 203 cases (62.65%) diagnosed as allergic rash, 55 cases (16.98%) diagnosed as urticaria, 51 cases (15.74%) diagnosed as measles scarlet fever-like rash, and 15 cases (4.63%) diagnosed as maculopapule. There were 94 (29.01%) cases with fever, and 78.70% allergic rash occurred within 24 hours of vaccination. Conclusion The incidence of allergic rash associated with vaccination was high in Huzhou City from 2017 to 2021, and vaccination-related allergic rash predominantly occurred within 24 hours following immunization with the first dose of vaccines. Allergic rash associated with vaccination was highly prevalent among children under 1 year.
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Received: 18 January 2023
Revised: 04 March 2023
Published: 17 April 2023
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