Objective: Hypericum perforatum (St. John's Wort) has long been used in traditional medicine to treat a variety of internal and external ailments. The present study was done to evaluate the immumodulatory potentials of the hydroalcoholic extract of H. perforatum. Materials and Methods: Twenty male BALB/c-mice were randomly allocated in two equal groups and immunized with sheep red blood cells (...

Effect of ethanolic extract of propolis, royal jelly, honey and bee pollen in comparison with virginiamycin (as growth promoter antibiotic) as regards the performance and immune system of Japanese quail were assessed. We used 256 mixed-sex quail chicks in a completely randomized design by eight treatments, including control, ethanolic extract of propolis 1000 (PE1) and 5000 (PE2) mg kg-1</...

This paper offers projections of future transmission dynamics for SARS-CoV-2 in an SEIRS model with demographics and waning immunity. In a stylized optimal control setting calibrated to the United States, we show that disease is endemic steady state its are characterized by damped oscillations. The magnitude oscillations depends on how fast immunity wanes. social distancing policy both curbs pe...

Whereas the usual notions of immunity -- e.g., immunity, hyperimmunity, etc. are associated with Cohen genericity, canonical as introduced by Beros, Khan and Kjos-Hanssen, is instead Mathias genericity. Specifically, every generic canonically immune no 2-generic computes a set.