As explained earlier, Tonsillectomy should not be performed during epidemics of poliomyelitis. This is because there are evidences that the virus may gain access to the exposed nerve sheaths and give rise to the fatal bulbar form of the disease. It should not be undertaken in the presence of respiratory tract infections or during the period of incubation of after contact with one of the infectious disease (i.e. Haemophilus) or if there is tonsillar inflammation. It is safer to wait for 3 weeks after an acute inflammatory disease, before performing tonsillectomyAccording of Turner - Tonsillectomy can be performed at any age, if there are sufficient indications for their removal. According to Dhingra - 6/e, p 428, Children < 3 years (Not < 4 years as given in the options) are poor candidates for surgery. So tonsillectomy should not be done in them. According to Head and Neck Surgery de Souza – “As tonsillar tissue has a role in the development of the immune system, it is advisable that surgery should be delayed until the age of 3 whenever possible.”