when must face masks be worn ?

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https://www.cdc.gov/coronavirus/2019-ncov/prevent-getting-sick/cloth-face-cover-guidance.html

COVID-19: Considerations for Wearing Masks | CDC
https://www.cdc.gov/coronavirus/2019-ncov/prevent-getting-sick/cloth-face-cover-guidance.html
Masks should completely cover the nose and mouth and fit snugly against the sides of face without gaps. Masks should be worn any time you are traveling on a plane, bus, train, or other form of public transportation traveling into, within, or out of the United States and in U.S. transportation hubs such as airports and stations.

https://www.who.int/emergencies/diseases/novel-coronavirus-2019/advice-for-public/when-and-how-to-use-masks

When and how to use masks – World Health Organization
https://www.who.int/emergencies/diseases/novel-coronavirus-2019/advice-for-public/when-and-how-to-use-masks
Masks should be used as part of a comprehensive strategy of measures to suppress transmission and save lives; the use of a mask alone is not sufficient to provide an adequate level of protection against COVID-19.

https://www.rfi.fr/en/france/20200719-wearing-face-masks-becomes-compulsory-in-france-from-monday-but-where-public-spaces-supermarkets

Face masks become compulsory in France – but where must …
https://www.rfi.fr/en/france/20200719-wearing-face-masks-becomes-compulsory-in-france-from-monday-but-where-public-spaces-supermarkets
The compulsory wearing of facemasks was originally scheduled for 1 August but concerns over a resurgence in new Covid-19 infections pushed the government to bring forward the decree to 20 July …

https://www.gov.uk/government/publications/face-coverings-when-to-wear-one-and-how-to-make-your-own/face-coverings-when-to-wear-one-and-how-to-make-your-own

Face coverings: when to wear one, exemptions, and how to …
https://www.gov.uk/government/publications/face-coverings-when-to-wear-one-and-how-to-make-your-own/face-coverings-when-to-wear-one-and-how-to-make-your-own
Face coverings must be worn by retail, leisure and hospitality staff working in any indoor area that is open to the public and where they’re likely to come into contact with a member of the …

https://www.mirror.co.uk/news/uk-news/should-you-wear-face-mask-21884156

When should you wear a face mask? Official guidance on how …
https://www.mirror.co.uk/news/uk-news/should-you-wear-face-mask-21884156
The World Health Organisation (WHO) has issued advice on who should use them, and when. Its advice covers who should wear them, when they should be worn, and how to wear them – in order to avoid…

https://www.hopkinsmedicine.org/health/conditions-and-diseases/coronavirus/coronavirus-face-masks-what-you-need-to-know

Coronavirus Face Masks: Types & When to Use | Johns …
https://www.hopkinsmedicine.org/health/conditions-and-diseases/coronavirus/coronavirus-face-masks-what-you-need-to-know
Face masks help contain respiratory droplets that can transmit SARS-CoV-2, the coronavirus that causes COVID-19, from people who do not know they have the virus. For example, when inside an office, store, restaurant or school, or when on public transportation, you should wear a mask. The only exceptions are times when you are alone or with your family, such as if you are in your office with …

https://www.bbc.com/news/health-51205344

Coronavirus: What are the rules for face masks or face …
https://www.bbc.com/news/health-51205344
Pupils in secondary schools in England may be required to wear masks in classrooms, at least until the Easter break. Each nation has different rules: In England, secondary schools require face…

https://www.thesun.co.uk/news/13221751/when-stop-wearing-face-masks-uk/

When can we stop wearing face masks in England?
https://www.thesun.co.uk/news/13221751/when-stop-wearing-face-masks-uk/
Wearing a face mask in shops became compulsory on July 24. Face coverings are also compulsory in England and Scotland in venues such as banks, places of worship, and libraries.

https://www.cdc.gov/coronavirus/2019-ncov/prevent-getting-sick/about-face-coverings.html

Your Guide to Masks | CDC
https://www.cdc.gov/coronavirus/2019-ncov/prevent-getting-sick/about-face-coverings.html
CDC recommends that people wear masks in public settings, at events and gatherings, and anywhere they will be around other people. Effective February 2, 2021, masks are required on planes, buses, trains, and other forms of public transportation traveling into, within, or out of the United States and in U.S. transportation hubs such as airports and stations.

https://www.mysafetysign.com/face-masks-required-signs

Face Masks Required Signs – Face Covering, Wear Masks
https://www.mysafetysign.com/face-masks-required-signs
Protect yourself and others by creating a precautionary barrier with masks. A masks required sign at your facility will make sure that the virus does not spread further. Remind your workers and visitors to prioritize safety first by putting on masks before entering the area.