CO Levels Behind and in Front of Different Protective Mask Types.

Objectives: Many individuals have difficulty adapting to face mask use and report symptoms while using masks. Our primary objective was to determine whether continuous mask-wearing causes elevated levels of carbon dioxide (CO) behind the facemasks.

Methods: CO concentrations were measured behind 3 different types of face masks and were compared to CO concentrations at the mask front in 261 subjects who continuously wore masks for at least 5 minutes.

SARS-CoV-2 Antibody Positivity and Prevalence in an Outpatient Medical Setting in Las Vegas, NV.

Background: SARS-CoV-2 antibody testing shows the prevalence of COVID-19 disease in different communities and has epidemiological significance.

Methods: SARS-CoV-2 IgM and IgG were tested in 319 patients, staff and visitors of a primary care clinic in Las Vegas, NV on a continuous as-requested basis.

Results: Prevalence of SARS-CoV-2 antibodies was 3.

The Coronaviruses: Past, Present, Future.

Description The current coronavirus pandemic is unparalleled in recent memory and fundamentally unique. It has been more than a century since humanity fought the Spanish flu pandemic. That widespread disease devastated a World War I-ravaged population when there was a relative paucity of medical knowledge.