The present disclosure relates generally to the field of anti-viral therapy and prophylaxis. Formulations and agents are provided which inhibit viruses of the Orthomyxoviridae family and ameliorate symptoms and conditions caused by viral infection. The present disclosure teaches the control of influenza virus infection and spread and amelioration of conditions caused thereby. The formulations and agents may be processed as medicaments or as health supplements for more general application such as in the form of consumer goods or consumer foods.