Vibrio cholerae is a bacteria that causes the disease cholera. Disease-causing agents such as V. cholerae is referred to as a(n) ________.

Pathogens refer to agents, such as bacteria, viruses, and other microorganisms that cause diseases.
Interferons are signaling molecules released to elicit antiviral immune response.
A commensal microorganism refers to normal flora living in a host organism without causing harm or benefit.
A vaccine is a biological preparation that improves immunity against a particular disease.