Usage History of 'filovirus'

The following chart shows how frequently 'filovirus' appeared in printed materials over time. For example, the word 'filovirus' occurred 7 times in books in 1984 and 1,459 times in 2008. From 1984 to 2008, the word 'filovirus' was used a total of 9,225 times in books scanned by Google. See Reference: Google Ngram project.

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