Usage History of 'lentiviruses'

The following chart shows how frequently 'lentiviruses' appeared in printed materials over time. For example, the word 'lentiviruses' occurred 2 times in books in 1974 and 1,177 times in 2008. From 1974 to 2008, the word 'lentiviruses' was used a total of 23,958 times in books scanned by Google. See Reference: Google Ngram project.

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