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'''***'''LOD: Limit of detection
'''****'''TCID50/mL represents the viral load at which 50% of cells are infected when a solution containing the virus is added to the cell culture. The <ref name="Arti32">Limits of detection limit is for FDA-authorized COVID-19 diagnostics, BioCentury, 2020, https://www.biocentury.com/article/304801/limits-of-detection-for-fda-authorized-covid-19-diagnostics</ref> Detection limits are often expressed in TCID50/mL. Copies/TCID50 for H1N1 is 2381 copies/TCID50 so 1 TCID50/mL represents 2381 copies per mL. It is a very rough method to determine concentration and it has a standrad standard deviation of about 1048 copies/TCID50.<ref name="Arti33">Analytical Sensitivity Comparison between Singleplex Real-Time PCR and a Multiplex PCR Platform for Detecting Respiratory Viruses, PLoS One, 2015,Parker J, Fowler N, Walmsley ML, Schmidt T, Scharrer J, Kowaleski J, Grimes T, Hoyos S, Chen J., https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4646456/</ref></sub></div>
CLIA waived tests are tests cleared for POC setting. These are simple tests with a relatively low risk for an incorrect result. Tests are scored by seven criteria on a scale of one to three, where a score of 1 indicates the lowest level of complexity. The tests may be called CLIA waived, if the score is low enough. The seven criteria are:<ref name="Arti27">Categorization Criteria CLIA test, FDA, 2020, Inc., https://www.fda.gov/node/365445#scorecard</ref>