When to wear a mask?
Everyone concerned about their health and the quality of the air they breathe should wear a mask and take precautions. Masks are used to filter out unwanted particles in the air. Air pollution, allergens and other insects in the air are part of the pollution in the environment. It is not necessary to use masks at all times, but it is highly recommended to use them in spaces with high concentration of people; buses, trains, flights, etc.
It is highly recommended and a polite gesture of social responsibility to use masks to spread air drops to other people. Especially if you are coughing or sneezing.
Keep in mind that masks are effective only when used in combination with other hygienic measures such as frequent hand cleaning with alcohol-based disinfectant or soap and water.
Remember that if you use a disposable mask you should know how to use it correctly and dispose of it properly.