Scientists have discovered a new medicine that can stop multiple types of viruses that cause serious illnesses in children, including hand, foot, and mouth disease. The medicine, called bofutrelvir, targets a key part of the virus called 3C protease, which is also found in the coronavirus that causes COVID-19. In animal tests, bofutrelvir was shown to be highly effective in reducing the severity of the virus and alleviating symptoms, even when given orally. This is significant because there is currently no vaccine that can protect against all types of enteroviruses, and finding a medicine that can target multiple viruses is a major breakthrough in the fight against these illnesses.