A nurse is reinforcing teaching with the parent of an infant who has sehorrheic dermitis (cradle cap) of the scalp. Which of the following instructions should the nurse include?

"When patches are present it indicates that your infant has asystemic infection."

"You should avoid washing your infant's hair while patches are on the scalp."

"When patches are present are present, you should keep your infant away from others.

"You can use petrolatum to help soften and remove patches from your infant's scalp".