Cases of coronavirus disease 2019 (COVID-19) have been reported in more than 200
countries. Thousands of health workers have been infected, and outbreaks have occurred in …

Background The pandemic of COVID-19 is growing, and a shortage of masks and
respirators has been reported globally. Policies of health organizations for healthcare …

Background This document provides advice on the use of masks in communities, during
home care, and in health care settings in areas that have reported cases of COVID-19. It is …

Objective Previous meta‐analyses concluded that there was insufficient evidence to
determine the effect of N95 respirators. We aimed to assess the effectiveness of N95 …

There were 3 influenza pandemics in the 20th century, and there has been 1 so far in the
21st century. Local, national, and international health authorities regularly update their plans …

Introduction The original use of face masks was to help protect surgical wounds from staff-
generated nasal and oral bacteria. Currently governments across the world have instituted …

An update is available for this article. Background: Recommendations on masks for
preventing coronavirus disease 2019 (COVID-19) vary. Purpose: To examine the …

New influenza A viruses emerge in humans from time to time, causing global pandemics.
The most recent influenza pandemic began in 2009 with the influenza A (H1N1) pdm09 …

The main clinical characteristics of COVID‐19 are respiratory symptoms that can lead to
serious cardiovascular damages and severe worsening of other medical conditions. One of …

Background Viral epidemics or pandemics of acute respiratory infections (ARIs) pose a
global threat. Examples are influenza (H1N1) caused by the H1N1pdm09 virus in 2009 …