en COVID 19 Original Research Original Research <span style="font-size:13pt"><span style="text-justify:kashida"><span style="text-kashida:0%"><span style="text-autospace:none"><span new="" roman="" style="font-family:" times=""><span style="font-style:italic"><b><span style="font-size:9.0pt"><span style="font-style:normal">Background: </span></span></b><span style="font-size:9.0pt"><span style="font-style:normal">The coronavirus disease 2019 (COVID-19) pandemic at the end of 2019 posed a global health concern. It has been found that health education is one of the best methods for health promotion, changing inappropriate personal behaviors, and increasing people&#39;s awareness and attitude through major health concerns, including the COVID-19 pandemic. This study aimed to investigate the effect of educational interventions with environmental health approach on the knowledge, attitude, and practice of people in the COVID-19 epidemic era in one residential complex in Tehran.</span></span></span></span></span></span></span></span><br> <span style="font-size:13pt"><span style="text-justify:kashida"><span style="text-kashida:0%"><span style="text-autospace:none"><span new="" roman="" style="font-family:" times=""><span style="font-style:italic"><span style="font-size:9.0pt"><span style="font-style:normal">&nbsp;&nbsp;&nbsp; <b>Methods:</b> This cross-sectional study was conducted in Tehran in 2021. The study population was households of a residential complex in Tehran, which was selected by a random sampling method. A researcher-made checklist was used to gather data for this study, and its validity and reliability in the domains of environmental health and knowledge, attitude, and practice in the COVID-19 setting were evaluated before it was used. An intervention was made through social media and the checklist was reevaluated after the intervention.</span></span></span></span></span></span></span></span><br> <span style="font-size:13pt"><span style="text-justify:kashida"><span style="text-kashida:0%"><span style="text-autospace:none"><span new="" roman="" style="font-family:" times=""><span style="font-style:italic"><span style="font-size:9.0pt"><span style="font-style:normal">&nbsp;&nbsp; <b>Results: </b>A total number of 306 participants were enrolled in this study. In the assessment of the knowledge, attitude, and practice after the intervention, the mean score of the mentioned values increased significantly (</span></span><span style="font-size:9.0pt">P</span><span style="font-size:9.0pt"><span style="font-style:normal"> < 0.001). However, the influence of intervention was more prominent in the improvement of knowledge and attitude than practice.</span></span></span></span></span></span></span></span><br> <span style="font-size:13pt"><span style="text-justify:kashida"><span style="text-kashida:0%"><span style="text-autospace:none"><span new="" roman="" style="font-family:" times=""><span style="font-style:italic"><span style="font-size:9.0pt"><span style="font-style:normal">&nbsp;&nbsp; <b>Conclusion:</b> Public health intervention with an environmental health approach can increase people&#39;s knowledge, attitude, and practice against chronic diseases and epidemics such as COVID-19.</span></span></span></span></span></span></span></span><br> &nbsp; Health Interventions, Environmental Health, Health Education, Health Promotion 439 445 http://mjiri.iums.ac.ir/browse.php?a_code=A-10-4408-4&slc_lang=en&sid=1 Hossein Masoumbeigi masoumbeigi@gmail.com 200319475328460077542 200319475328460077542 No Health Research Center, Life Style Institute, & Department of Environmental Health Engineering, School of Public Health, Baqiyatallah University of Medical Sciences, Tehran, Iran Amir Mirshafiee a_mirsh1@yahoo.com 200319475328460077543 200319475328460077543 No Health Research Center, Life Style Institute, Baqiyatallah University of Medical Sciences, Tehran, Iran Ghader Ghanizadeh qanizadeh@bmsu.ac,ir 200319475328460077544 200319475328460077544 Yes Department of Environmental Health Engineering, School of Public Health, & Health Management Research Center, Baqiyatallah University of Medical Sciences, Tehran, Iran Mahdi Raei mehdi_r_d@yahoo.com 200319475328460077545 200319475328460077545 No Health Research Center, Life Style Institute, Baqiyatallah University of Medical Sciences, Tehran, Iran Mohsen Saffarri saffari.ches@gmail.com 200319475328460077546 200319475328460077546 No Health Research Center, Life Style Institute, Baqiyatallah University of Medical Sciences, Tehran, Iran Reza Yousefi Arfaei arfaei.reza@yahoo.com 200319475328460077547 200319475328460077547 No Department of Environmental Health Engineering, School of Public Health, & Students’ Research Committee, Baqiyatallah University of Medical Sciences, Tehran, Iran Mohammad Amin Shahrbaf aminshahrbaf41@gmail.com 200319475328460077548 200319475328460077548 No Faculty of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran