Viral Half Maximal Inhibitory Concentration Fold Change from Baseline Measurement

**Semantic type:** Laboratory or Test Result

**Definition:** A fold change based on a concentration of a specific drug expected to produce 50% inhibition of the standard growth of a viral organism, or of a biological/biochemical reaction. It is a ratio calculated by the current IC50 Treatment Result divided by the IC50 Treatment Result from the baseline visit.

**Synonyms:** - IC50 Fold Change from Baseline