 Todos Medical Ltd announced that its coronavirus COVID-19 testing laboratory Provista Diagnostics has struck an agreement with a physician group that boasts a presence in over 40 states. The reference laboratory services agreement covers the semi-quantitative cPass neutralizing antibody test, which recently expanded upon its Emergency Use Authorization with the addition of semi-quantitative titer claims to be able to measure convalescent neutralization activity and provide a score to monitor over time. 