With the number of dengue cases in the country increasing, the traditional belief of curing it by papaya's leaf juice has spread and suddenly there is a demand for the papaya tree.br br So is this simply folklore or does this juice really helps? Anecdotal evidence suggests that the extract of raw papaya leaf helps to boost platelets, also known as thrombocytes, and relieves symptoms.br br Dengue fever, caused by the dengue virus that is transmitted by mosquitoes, can be fatal. Symptoms include high fever with headache, severe muscle pain, joint pain and red rashes on the body including itching.