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https://www.firstpost.com/health/covid-19-testing-how-antibody-antigen-rt-pcr-truenat-tests-differ-their-strengths-and-limitations-8548691.html Editor’s Note: This story was originally published on 5 July, and has been republished on 9 July with a correction made to TrueNat’s limitations. The story now reflects, as per the ICMR advisory dated 19 May 2020, that TrueNat is a comprehensive assay for screening and confirmation of COVID-19 cases.  The scale and accuracy of ongoing COVID-19 testing in India are in a gradual state of […]

Researchers reevaluate the safety of radiation used in medical imaging By Carina Storrs on July 1, 2013 Image Credit: Shannon Freshwater This article was originally published with the title “Do CT Scans Cause Cancer?” in Scientific American 309, 1, 30-32 (July 2013); doi:10.1038/scientificamerican0713-30 Ever since physicians started regularly ordering CT (computed tomography) scans four decades ago, researchers have worried