My doctor told me of someone that was so sick and no doctor could figure out the cause. She had seen doctor all over the world looking for an answer! This individual had lived in South America . She finally was referred to my ND she had heart palpitations, wheezing shortness of breath, nausea, dizziness, lower back pain and stiff neck weight loss . The doctor put her on anti=parasitic medicine . Around three months later she called the doctor and said, she felt like they were going to die. The doctor told them what to do ...the next day she passed a big nest of parasites! Gross these things were living in her body for so long. This happened at around the 90 days mark, of taking the medicine daily so this proved to me that many people may not get well because they are not on the medication long enough. Anyhow this was the cause of pretty severe illness ... another poor person suffering needlessly and was sick for years! Now she is fine