Immunology does not suffer from a lack of experimental data, but still some of the most elementary questions are undecided, and it is not yet possible to choose between instructive and elective theories.” Joshua Ledergerg, Genes and Antibodies https://doi.org/10.1126/science.129.3364.1649 Every scientific theory relies on the scientific method. A scientist may make an observation and devise a… Continue reading The Clonal Selection Antibody Theory (1957)