Elsevier established a free COVID-19 resource centre in January 2020, offering information in English and Mandarin. The company grants permission to make all related research freely available in PubMed Central and other repositories for research use. The article discusses the potential for airborne transmission of SARS-CoV-2, emphasizing the need for engineering controls to reduce indoor infection risks. Evidence from hospital studies suggests that SARS-CoV-2 can be present in the air, with viral loads varying by size and location. The article argues that existing evidence supports the use of engineering controls, such as improved ventilation, filtration, and air disinfection, to mitigate airborne transmission. It also highlights the importance of avoiding air recirculation and minimizing overcrowding. Recommendations include increasing ventilation rates, using air cleaning devices, and implementing measures to reduce the number of people in enclosed spaces. The study concludes that effective ventilation and other engineering controls are crucial for reducing the spread of SARS-CoV-2 and other airborne pathogens, alongside other infection control measures. The article emphasizes the need for these measures in public buildings and healthcare settings to protect healthcare workers, patients, and the general public.Elsevier established a free COVID-19 resource centre in January 2020, offering information in English and Mandarin. The company grants permission to make all related research freely available in PubMed Central and other repositories for research use. The article discusses the potential for airborne transmission of SARS-CoV-2, emphasizing the need for engineering controls to reduce indoor infection risks. Evidence from hospital studies suggests that SARS-CoV-2 can be present in the air, with viral loads varying by size and location. The article argues that existing evidence supports the use of engineering controls, such as improved ventilation, filtration, and air disinfection, to mitigate airborne transmission. It also highlights the importance of avoiding air recirculation and minimizing overcrowding. Recommendations include increasing ventilation rates, using air cleaning devices, and implementing measures to reduce the number of people in enclosed spaces. The study concludes that effective ventilation and other engineering controls are crucial for reducing the spread of SARS-CoV-2 and other airborne pathogens, alongside other infection control measures. The article emphasizes the need for these measures in public buildings and healthcare settings to protect healthcare workers, patients, and the general public.