File:Graph of number of papers by year in PubMed containing "coronavirus" up to 2019.png
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![File:Graph of number of papers by year in PubMed containing "coronavirus" up to 2019.png](https://upload.wikimedia.org/wikipedia/commons/thumb/e/ed/Graph_of_number_of_papers_by_year_in_PubMed_containing_%22coronavirus%22_up_to_2019.png/799px-Graph_of_number_of_papers_by_year_in_PubMed_containing_%22coronavirus%22_up_to_2019.png?20210104183021)
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