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Explanation
Mohan: Hello rahul!! Can u pls tell me what a face mask is?
Rahul: Oh that! A face mask is a mask that can restrict breathing for small children as their airways are smaller than older children and adults. Toddlers who have celebrated their second birthday should wear a mask when possible. There can be some flexibility in these rules, depending on where you are going.
Mohan: Oh.... But aren't they good
Rohan:They r good for adults but not for toddlers and children.
Mohan: Oh... Thankyou very much for your advice.
Rahul: Welcome.
Hope this answer helps....