What is schistosomiasis and what are the symptoms of bilharzia?

Science on Instagram: "The life cycle of Plasmodium, the parasite that causes malaria, involves two hosts — humans and female Anopheles mosquitoes — and is often explained through animations to show the stages clearly. When an infected mosquito bites a person, it injects sporozoites into the bloodstream, which travel to the liver and multiply. These then enter red blood cells, where they continue to reproduce and cause symptoms of malaria. Some parasites develop into sexual forms (gametocytes),