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Research and Studies

Mask mandate and use efficacy in state-level COVID-19 containment

Conclusions Mask mandates and use are not associated with slower state-level COVID-19 spread during COVID-19 growth surges. Containment requires future research and implementation of existing efficacious strategies. Damian D. Guerra, Daniel J. Guerra https://www.medrxiv.org/content/10.1101/2021.05.18.21257385v1?fbclid=IwAR3Ucz9EH41bExn9yGjfuzVlBVXw_T46IWrjJqE_o3at-0_njiPIENS8wBQ

Is a Mask That Covers the Mouth and Nose Free from Undesirable Side Effects in Everyday Use and Free of Potential Hazards?

The mask-induced adverse changes are relatively minor at first glance, but repeated exposure over longer periods…is relevant. Long-term disease-relevant consequences of masks are to be expected… With correspondingly repeated and prolonged exposure to physical, chemical,… Read More »Is a Mask That Covers the Mouth and Nose Free from Undesirable Side Effects in Everyday Use and Free of Potential Hazards?

Corona children studies “Co-Ki”: First results of a Germany-wide registry on mouth and nose covering (mask) in children

“Impairments caused by wearing the mask were reported by 68% of the parents. These included irritability (60%), headache (53%), difficulty concentrating (50%), less happiness (49%), reluctance to go to school/kindergarten (44%), malaise (42%) impaired learning… Read More »Corona children studies “Co-Ki”: First results of a Germany-wide registry on mouth and nose covering (mask) in children

Exhaled aerosol increases with COVID-19 infection, age, and obesity

In our observational cohort study of the exhaled breath particles of 194 healthy human subjects, and in our experimental infection study of eight nonhuman primates infected, by aerosol, with SARS-CoV-2, we found that exhaled aerosol particles vary between subjects by three orders of magnitude, with exhaled respiratory droplet number increasing with degree of COVID-19 infection and elevated BMI-years.

Effectiveness of Adding a Mask Recommendation to Other Public Health Measures to Prevent SARS-CoV-2 Infection in Danish Mask Wearers: A randomized control trial

“A total of 3030 participants were randomly assigned to the recommendation to wear masks, and 2994 were assigned to control; 4862 completed the study. Infection with SARS-CoV-2 occurred in 42 participants recommended masks (1.8%) and… Read More »Effectiveness of Adding a Mask Recommendation to Other Public Health Measures to Prevent SARS-CoV-2 Infection in Danish Mask Wearers: A randomized control trial

Nonpharmaceutical Measures for Pandemic Influenza in Nonhealthcare Settings—Personal Protective and Environmental Measures

“In our systematic review, we identified 10 RCTs that reported estimates of the effectiveness of face masks in reducing laboratory-confirmed influenza virus infections in the community from literature published during 1946–July 27, 2018. In pooled… Read More »Nonpharmaceutical Measures for Pandemic Influenza in Nonhealthcare Settings—Personal Protective and Environmental Measures