It is not known whether transmission occurred by direct transfer of body fluids from one person to the other (eg droplet spread), or whether a contaminated fomite (eg a shared drinking container) was responsible.
Respiratory transmission may occur through exposure to vomit or fomite (a contaminated object).
Many common objects are fomites, which can sustain a pathogen until a person comes in contact with it.
Because of the potential for fomite transmission, some specialists recommend that people who are severely immuno-compromised should not share a room with a patient with cryptosporidiosis.