How long are you contagious with Cryptosporidium?

Could you please elaborate on the duration of contagiousness when infected with Cryptosporidium? I'm curious to know how long an individual can potentially spread the parasite to others after contracting the illness. Is there a specific timeframe or does it vary depending on factors such as the individual's immune system or the severity of the infection? Additionally, are there any specific precautions or measures that can be taken to minimize the risk of transmission during this period?