Masks should NOT be put on babies or children younger than two years of age because of the danger of suffocation. Children ages 2 years and older can wear masks or respirators to protect themselves and others from COVID-19.
Wearing masks is a public health measure people can take to reduce the spread of COVID-19 in addition to (not instead of) social distancing, frequent hand washing, and other everyday preventive actions. When your child wears a mask, make sure to choose a well-fitting and comfortable mask or respirator that your child can wear properly. A poorly fitting or uncomfortable mask or respirator might be worn incorrectly or removed often, and that would reduce its intended benefits.
Masks protect both the wearer and others. Masks are a simple barrier to help prevent your respiratory droplets from reaching others. Studies show that masks reduce the spray of droplets when worn over the nose and mouth. A mask also offers you some protection too and how well it protects you from breathing the virus in depends on the fabric used and how the mask is made
More specifics on masks from the Michigan Department of Health and Human Services can be found at Michigan.gov/MaskUp.
Sources:
CDC: Cloth Face Coverings
CDC: COVID-19 Frequently Asked Questions
MDHHS: Face Coverings Frequently Asked Questions