The topic of the most concern regarding the safety of bipolar ionization air purification technology is ozone production. UL 2998 certification allows addressing the issue of ozone production. However, there are other concerns occasionally reported in the limited amount of literature available. Some report cardio respiratory issues (https://bit.ly/3pbhcmF), CDC recommends users to do extensive research on their own part (https://bit.ly/367tS6r), EPA warns about higher rate of respiratory tract deposition of charged PM (https://bit.ly/3sJoIaB), whereas a number of companies are claiming significant benefits of this technology over traditional air purification technologies. What are some of the documented peer-reviewed research that provide evidence in favor of or against this technology?