Scarlet fever may recur after recovery, but the chances are relatively small. Scarlet fever is a contagious disease, usually caused by infection with group A beta streptococcus, which is relatively infectious, and there is no specific vaccine or medication to prevent and control the spread of scarlet fever, and only antibiotics can be used to treat scarlet fever when it occurs. Moreover, scarlet fever does not produce persistent antibodies in the human body after it is completely cured, and the disease will recur if it comes into contact with a person suffering from scarlet fever or is infected by other types of streptococcus. Scarlet fever is an acute respiratory infectious disease that is not immune to life-long immunity, so it is important to wear a mask and pay attention to hand hygiene in crowded places to minimize the spread of the disease.