The faecal-oral pathway (person to person and animal to person) and consumption of contaminated foods and water are the modes of transmission of Cryptosporidium. Contaminated food and water can also be the source of infection. Cryptosporidiosis is usually self-limiting but can cause serious illness in those with weak immune systems. There is no specific treatment for cryptosporidiosis. Symptoms will subside on their own if the infection isn't too severe. Prevention includes washing hands regularly, drinking clean water, and not eating or drinking anything from the street. If you have an immunocompromised loved one, avoid providing them with untreated surface water for play purposes. If you suspect you may have been exposed to the virus, seek medical attention immediately. You could be given a prescription medication to reduce symptoms associated with exposure to the virus.