CDC recommends that people should wear masks in the following scenarios: - When indoors in public, if in areas of high local transmission or if not up to date on COVID-19 vaccines
- When outdoors in close contact with other people (in areas of high local transmission), especially considering people with weakened immune systems or increased risk of disease or not up to date on COVID-19 vaccines
- If a person has a weakened immune system, even if up to date on COVID-19 vaccines
- On any form of public transportation
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