Comparison of breath-guards and face-masks on droplet spread in eye clinics.

Introduction: COVID-19 has impacted ophthalmic care delivery, with many units closed and several ophthalmologists catching COVID-19. Understanding droplet spread in clinical and training settings is paramount in maintaining productivity, while keeping patients and practitioners safe.

Objectives: We aimed to assess the effectiveness of a breath-guard and a face mask in reducing droplet spread within an eye clinic.

Detection of dental fomites using topical fluorescein.

Background Thorough disinfection of dental facilities is of paramount importance during the COVID-19 pandemic. Patients, clinicians, students and nurses can all be infected by aerosols and dental droplets bearing COVID-19. However, droplets are transparent and often microscopic, so are difficult to detect in clinical practice.

The use of aerosol generating procedures (AGPs) during the COVID-19 pandemic in the diagnosis of lung cancer: a narrative review.

Objective: In this article we discuss the current evidence for these concerns and highlight where further work is required to understand the risk from these procedures and how it can be mitigated for.

Background: The COVID-19 (coronavirus-19 or SARS-CoV-2) pandemic has impacted on many aspects of patient care both for those with the virus and those with other illnesses. Of particular concern has been the risk to staff and patients from the spread of the virus in health care settings.

Rapid growth of anthropogenic organic nanoparticles greatly alters cloud life cycle in the Amazon rainforest.

Aerosol-cloud interactions remain uncertain in assessing climate change. While anthropogenic activities produce copious aerosol nanoparticles smaller than 10 nanometers, they are too small to act as efficient cloud condensation nuclei (CCN). The mechanisms responsible for particle growth to CCN-relevant sizes are poorly understood.