Health
Affinity, avidity, IgM, IgG, serological surveys and ‘antibody passports’ – Pursuit
The University of Melbourne’s Peter Doherty explains our immune response to COVID-19 and what ‘antibody passports’ look for after vaccination or infection.

Professor Peter Doherty AC
This article is the latest in a series of weekly columns about all things infection and immunity written by Nobel Laureate Professor Peter Doherty for the Doherty Institute, Setting It Straight.
Affinity weve met before when talking about the specific binding of Ig receptors to their complementary (cognate) antigens, but avidity, whats that about?
Molecular model of a single antibody. Antibodies have a characteristic Y-shaped structure composed of 2 heavy chains (or…
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