Papaya extract is an all-round prevention and treatment. Because of its enzyme and probiotic ability, it enhances the immune system, while also providing anti-biotic, anti-fungal, anti-parasitic and anti-viral medicine. I am treating my cat for terminal cancer. Other remedies are added to the treatment like extra enzymes and turmeric. Mr Huckleberry was given 3 weeks to live 18 weeks ago. He is recovering well with 2 or 3 squirts of papaya in the mouth per day. Using papaya extract means that I don't even have to give him flee treatment!