Most likely your child has an episode of viral infection. However, when we are going through a phase of H1N1 infection which is also a viral infection, different countries have developed guidelines for diagnosis and management. Your concern about use of Tamiflu are right. Most countries do not recommend Tamiflu in asymptomatic individuals. Also, Tamiflu is not without side effects and should be used when the index of suspicion is high. It may be wise to discuss this issue with your local health personnel, raise your concerns and come to a solution.