Is the use of a mask useful in the prevention of covid-19 disease? An Evidence review study

Background and aims: Coronaviruses are important pathogens in humans and animals. In late 2019, a new coronavirus was identified as the cause of a group of pneumonia cases in Wuhan, Hubei Province, China. The disease spread rapidly, resulting in epidemics in China and reports of sporadic cases worldwide. In February 2020, the World Health Organization (WHO) identified COVID-19, which stands for Coronavirus 2019. The virus that causes COVID-19 has been identified as the Coronavirus virus, Severe acute respiratory syndrome 2 (SARS-CoV-2), formerly known as 2019-nCoV. Coronavirus disease 2019 (COVID-19) is a name for the disease, and the virus that causes it is known SARS-CoV-2. The very rapid spread of the COVID-19 in China and in many other countries has caused fear among people across the world. The novel coronavirus outbreak declared a Public Health Emergency of International Concern on 30 January 2020. Due to the fact that one of the ways of transmitting the coronavirus is through respiration, one of the most important ways to prevent coronavirus is to use personal protective equipment, including masks, so the knowledge around the use of masks by the general public prevention COVID-19 disease transmission is advancing rapidly. Policymakers require guidance on how to use masks and how to use them for people in the community to combat the COVID-19 disease pandemic. In this article, the relevant literature to inform multiple areas include transmission characteristics of COVID-19 disease, filtering characteristics and efficacy of masks and estimated population impacts of widespread community mask use were synthesized. Methods: In this descriptive review study was examinesd all articles on mask wear and its effect on the prevention of transmission of pandemic diseases, including COVID-19 and influenza, which were published in Farsi and English. PubMed, Web of Science, Google Scholar, Scopus and Embase databases were used to search for articles, focusing on the use of masks and the prevention of COVID-19 disease, and combining appropriate keywords (Masks, SARS-CoV-2, COVID-19, Influenza, Epidemic, Prevention and Transmission) without restricting the type of study. Results: Corona virus size ranges from 80 to 160 nanometers, which can help in choosing the appropriate mask and respiratory protection. Anyone who comes in close contact (less than of two meters away) with a person with respiratory symptoms (such as sneezing, coughing, etc.) is at risk for exposure t