True allergies to cow's milk are relatively uncommon. Only 2 to 3 percent of children are allergic to milk, according to the AAP, and almost all of them outgrow it by age 3. (Learn the difference between a milk allergy and lactose intolerance .).
The underscore [ _ ] (also called underline, underbar, low line, or low dash) is a character that originally appeared on the typewriter and was primarily used to underline words.
Look for the underscore key beside the zero key on the keyboard. This key has two lines, one for the hyphen and the other for the underscore. To use the underscore, press Shift and the underscore key. Once you have an idea for an email address, write it in the text field on the respective website.