or concentrations of an antibody. These surveys are potentially the most direct and informative technique available to infer the dynamics of a population's susceptibility and level of immunity. The authors proposed a World Serology Bank (or serum bank) and foresaw "associated major methodological developments in serological testing, study design, and quantitative analysis, which could drive a step change in our understanding and optimum control of infectious diseases." In a helpful reply entitled "Opportunities and challenges of a World Serum Bank", de Lusignan and Correa observed that the In another helpful reply on the World Serum Bank, the Australian researcher Karen Coates declared that: In April 2020, Justin Trudeau formed the COVID-19 Immunity Task Force, whose mandate is to carry out a serological survey in a scheme hatched in the midst of the COVID-19 pandemic. See also Medical laboratory Seroconversion Serovar Medical technologist Dr. Geoffrey Tovey, noted serologist Forensic serology References External links Serology (archived) – MedlinePlus Medical Encyclopedia Clinical pathology Blood tests Epidemiology Immunologic tests