Figure 4From: Measles viral load may reflect SSPE disease progressionRelationship between viral load, disease duration and M gene substitutions. Linear correlation of log10 of viral load with (A) disease duration (●) and persistence from initial infection to sample date (□) or (B) number of amino acid (●) and nucleotide (□) substitutions in the MV M gene. R2 values are indicated for each correlation. For patients UK98 and UK111, where length of persistence is not precisely known, an average was calculated from shortest and longest possible duration of persistence.Back to article page