Observational studies made so far suggest that optimum usage of face masks would result in the reduced risk of spreading COVID-19.
Mask wearing is one of the key measures taken by the WHO-China Joint Mission to prevent COVID-19 transmission in China. As a result, there was a considerable reduction in the number of people getting infected by the virus.
The COVID-19 pandemic has given rise to a lot of potentially dangerous misinformation. For reliable advice on COVID-19 including symptoms, prevention and available treatment, please refer to the World Health Organisation or your national healthcare authority.