Background Tea trees originated in southwest China 60 million or 70 million years ago.
Written records show that Chinese ancestors had begun drinking tea over 3000 years ago …

Increasingly prevalent respiratory infectious diseases (eg, COVID-19) have posed severe
threats to public health. Viruses including coronavirus, influenza, and so on can cause …

Community face masking is possibly of great value in reducing COVID-19 transmission,
especially when universally adopted with high compliance. The aim of this study is to …

The government has established a health protocol for the adaptation of new habits, one of
which is the use of cloth masks for healthy people. The public's indiscipline with wearing …

A pandemia de COVID-19 já causou mais de 399 milhões de infecções e custou a vida de
mais de cinco milhões de pessoas no mundo, até 3 de março de 2022. Para reduzir a taxa …

The filtration efficiency of cloth masks for small harmful particles is usually low because of
the large pore size of fabrics and the difficulty to choose appropriate fabric specifications. In …

Homemade cloth masks and other improvised face coverings have become widespread
during the COVID-19 pandemic driven by severe shortages of personal protective …

(1) Purpose: In 2020, wearing of face masks was mandated in the United States in an effort
to lessen transmission of the novel 2019 coronavirus disease (COVID-19) pandemic; …

Introduction The use of face masks is one of the preventive measures that Mozambique
adopted in order to limit the spread of COVID-19. A study carried out from May 25 to June 6 …

Purpose: To describe Brazilians' behavior regarding face mask use and health literacy
during the COVID-19 pandemic before and after the Ministry of Health of Brazil formal …