A cholera vaccine is a vaccine that is effective at preventing cholera.

Clinical trials are prospective biomedical or behavioral research studies on human participants designed to answer specific questions about biomedical or behavioral interventions, including new treatments (such as novel vaccines, drugs, dietary choices, dietary supplements, and medical devices) and known interventions that warrant further study and comparison.

An inactivated vaccine (or killed vaccine) is a vaccine consisting of virus particles, bacteria, or other pathogens that have been grown in culture and then killed to destroy disease-producing capacity.

An influenza vaccine, commonly known as a flu shot, is a vaccine that helps protect against influenza.

Polymerase Chain Reaction (PCR) is a technique used in molecular biology to amplify a specific DNA sequence.

A randomized controlled trial (RCT) is a scientific study design commonly used in the fields of medicine, psychology, and social sciences to evaluate the effectiveness of a new intervention or treatment.

Serology is the scientific study of serum and other body fluids.