Fully Quantitative Measurements of Differential Antibody Binding to a Spectrum of SARS-CoV-2 Spike Proteins: Wuhan, Alpha, Beta, Gamma, Delta, Omicron BA.1, BA.4, BA.5, BA.2.75 and BA.2.12.1 https://www.medrxiv.org/content/10.1101/2023.01.11.23284431