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How long does blood syndrome last?

Three to seven days.

Put it in the air to remove water, dry and wet clothes, and dry and wet clothes are exposed to evaporated water. Take the clothes to the balcony to dry.

Blood card is the serial number of blood drawing, which is mainly used to mark which tube of blood the baby has drawn. It has nothing to do with blood type, and you can't see any blood type from it. You can check the blood type to draw blood for ABO blood type identification and testing.