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Table 1 Basic population genetics summary of the data sets of the pre-vaccination and post-vaccination eras.

From: Evidence of recombination among early-vaccination era measles virus strains

  Danish early-vaccination era data set Global post-vaccination era data set
Length of sequences 800 800
Number of sequences 18 40
Average number of differences 12.2 31.0
# synonymous substitutions 26 131
# non-synonymous substitutions 32 71
Average Pi (nucleotide diversity)   
1. all sites 0.014 0.040
2. synonymous sites 0.030 0.109
3. non-synonymous sites 0.009 0.019
Transition/transversion bias 2.2 9.4
Codon usage bias (ENC) 53 55