11 These reactions mostly result from hypersensitivity to residua

11 These reactions mostly result from hypersensitivity to residual egg protein and less likely to thiomersal. The estimated risk of the Guillain-Barré syndrome is reported to be approximately one additional case per million persons vaccinated, with the total number of cases peaking 2 weeks after vaccination.11,14 However, in our #research randurls[1|1|,|CHEM1|]# study there were no severe adverse reactions such as allergic reactions or the Guillain-Barré syndrome. Extensive efforts are Inhibitors,research,lifescience,medical needed to control influenza. Because health care workers provide care for patients at a high risk for developing complications related to influenza, they

should be considered as a priority for expanding influenza vaccine usage. Given the low rates of influenza vaccination among our health care workers (<14%), implementing policies to increase influenza vaccine

coverage is critical. A mandatory influenza vaccination policy for health Inhibitors,research,lifescience,medical care workers, exempting only those with a medical contraindication, seems to be a highly effective approach for achieving high vaccine coverage among this group of people.15 Achieving and sustaining high vaccination coverage among health care workers will protect staff and their patients, and reduce disease burden and health care costs. Educating Inhibitors,research,lifescience,medical the staff regarding the minimal side effects of vaccination has a central role in this regard. It should be emphasized that vaccine-related side effects are minimal and have had limited to no impact on the rates of absence from work in health care workers. Education should be accompanied by providing evidence-based documents about the effectiveness and safety of the vaccine. One of the limitations of our study is that it was based on questionnaires Inhibitors,research,lifescience,medical completed by health care workers and, therefore, the answers were subjective. Consequently, personal biases could have influenced the results regarding the rate of adverse reaction and the duration of symptoms. Our study was disadvantageous

because there Inhibitors,research,lifescience,medical was no control group and the calculation of relative risk was not possible. Moreover, as there was no randomization, the study sample may not be representative of the population of health care workers. Conclusion Local adverse reactions after influenza vaccination were MycoClean Mycoplasma Removal Kit far more common than expected. Most of these reactions were mild and transient and did not outweigh the beneficial effects of influenza vaccination in health care workers. The trivalent inactivated split influenza vaccine, Begrivac®, seems to be safe and well tolerated. Continuous surveillance is needed to assess the potential risks and benefits of newly produced influenza vaccines. Acknowledgment We thank Mohamad Karimi, Latifeh Mafakheri, amd Farzam Bidarpoor, for providing insight about survey design and for administering the survey and maintaining the database. Finally, we thank the health care workers who graciously completed our survey. Conflict of Interest: None declared.

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