Final answer:
Aspirin is discouraged for treatment of viral infection in children due to the risk of developing Reye's syndrome.
Step-by-step explanation:
The reason why aspirin (ASA) is discouraged for the treatment of viral infections in children is because of the risk of developing Reye's syndrome. Reye's syndrome is a complication of influenza that primarily occurs in children and teenagers. It causes swelling in the liver and brain, which can lead to neurological damage, coma, or even death.