The CDC’s changes to mask guidelines raised questions. Here are 6 answers
Lifting the mask requirement for vaccinated people caught scientists off guard, experts say
![woman and child at grocery store not wearing masks with man wearing mask](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2021/05/052121_cv-team_mask-qa_feat.jpg?fit=1030%2C580&ssl=1)
With the new CDC guidelines, there’s a mix of mask-wearing indoors, which has raised concerns among some health experts.
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