This month we cover an old classic, the Tissue Culture Infectious Dose 50 assay, or TCID50. The TCID50 assay is used to quantify viral titres by determining the concentration at which 50% of the infected cells display cytopathic effect (CPE). As long as the virus of interest causes cell death, this assay has the advantage … Continue reading Timeless TCID50: One solution to many viruses