Adjuvant

A substance that enhances the immune response to the antigen with which is it mixed

Antibiotic

A compound that inhibits the growth and reproduction of bacteria. Antibiotics are not effective against viruses.

Antibody

A specialized protein produced by the immune system that helps destroy disease-causing organisms. An antibody is a component of humoral immunity. Antibodies can be effective defenders against both bacteria and viruses. An antibody must be made specifically for each pathogen.

Antigen

A protein or other substance capable of triggering an immune response

Antiviral

A compound that inhibits the growth and reproduction of viruses

Aptamer

Short strands of DNA or RNA that are designed to bind to certain target molecules

Arthropod

An invertebrate animal that has an external skeleton, a segmented body, and jointed appendages. This classification includes insects, spiders, and crustaceans. Some types, such as mosquitoes and ticks, can transmit diseases.

Attenuate

To reduce the virulence of