Keeping up with studies on covid-19: systematic search strategies and resources
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* Farhad Shokraneh

The reason I write this letter is to take a small step towards helping readers with evidence based decision making by keeping them up to date with the rapidly growing number of covid-19 studies in PubMed and other resources.1 Many studies are not going to be visible in PubMed or Embase in the next few months because of indexing and content policy in bibliographic databases that avoids indexing preprint and unpublished studies, including registered clinical trials.

*   PubMed for recent published literature on covid-19
    
    *   Live strategy and results in current PubMed: [tinyurl.com/waj7hmj](https://tinyurl.com/waj7hmj)
    
    *   Live strategy and results in future PubMed: [tinyurl.com/uwbsvo2](https://tinyurl.com/uwbsvo2)

*   medRxiv and bioRxiv for unpublished studies on covid-19
    
    *   [connect.medrxiv.org/relate/content/181](http://connect.medrxiv.org/relate/content/181)

*   ClinicalTrials.Gov for clinical trials on covid-19
    
    *   Live strategy and results: [tinyurl.com/t9vwzfo](https://tinyurl.com/t9vwzfo)

*   Google Scholar for published and unpublished literature on covid-19
    
    *   Live strategy and results: [tinyurl.com/spj6oox](https://tinyurl.com/spj6oox)

*   Evidence for Policy and Practice Information and Co-ordinating Centre: covid-19: living map of the evidence
    
    *   [tinyurl.com/rw5ym7x](https://tinyurl.com/rw5ym7x)

*   Cochrane resources on coronavirus (covid-19)
    
    *   [www.cochranelibrary.com/covid-19](http://www.cochranelibrary.com/covid-19)

*   Oxford covid-19 evidence service
    
    *   [www.cebm.net/covid-19](http://www.cebm.net/covid-19)

*   NICE rapid guideline and summaries on covid-19
    
    *   [www.nice.org.uk/covid-19](http://www.nice.org.uk/covid-19)

*   WHO coronavirus disease (covid-19) pandemic
    
    *   [www.who.int/emergencies/diseases/novel-coronavirus-2019](http://www.who.int/emergencies/diseases/novel-coronavirus-2019)

## Footnotes

*   Competing interests: None declared.

## References

1.  Godlee F. Covid-19: weathering the storm. Editor’s choice. BMJ2020;368:m1199doi:10.1136/bmj.m1199.
    
    [FREE Full Text](https://www.bmj.com/lookup/ijlink/YTozOntzOjQ6InBhdGgiO3M6MTQ6Ii9sb29rdXAvaWpsaW5rIjtzOjU6InF1ZXJ5IjthOjQ6e3M6ODoibGlua1R5cGUiO3M6NDoiRlVMTCI7czoxMToiam91cm5hbENvZGUiO3M6MzoiYm1qIjtzOjU6InJlc2lkIjtzOjE4OiIzNjgvbWFyMjZfMjYvbTExOTkiO3M6NDoiYXRvbSI7czoyMzoiL2Jtai8zNjkvYm1qLm0xNjAxLmF0b20iO31zOjg6ImZyYWdtZW50IjtzOjA6IiI7fQ==)