Guava tea
The use of guava tea markedly inhibits the activity and multiplication of influenza virus A and its subtype (H1N1), and there is lesser growth of clinical influenza. The active ingredients of guava tea inhibit the activity of sialidase and hemagglutination. There was a noticeable reduction in the replication of the influenza virus by using guava tea regularly. The active ingredients in guava tea produce pro-inflammatory cytokines, and there is frequent stimulation of antiviral activity in the cells. The antibodies against influenza virus A and influenza virus B also start producing higher concentrations after the oral administration of guava tea by the influenza infection patients.