Why Are COVID Fatality Rates Dropping?

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From SciShow.

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Near the end of 2020, we got some puzzling but good news: COVID-19 fatality rates have been dropping. Here are a few factors that might help explain why we’re seeing this trend.

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Sources:
https://onlinelibrary.wiley.com/doi/full/10.1111/tbed.13819
https://www.journalofhospitalmedicine.com/jhospmed/article/230561/hospital-medicine/trends-covid-19-risk-adjusted-mortality-rates
https://coronavirus.jhu.edu/data/mortality
https://www.who.int/news-room/commentaries/detail/estimating-mortality-from-covid-19
https://www.sciencedirect.com/science/article/pii/S1201971220321809
https://www.who.int/bulletin/online_first/BLT.20.265892.pdf
https://nyulangone.org/news/study-helps-explain-declines-death-rates-covid-19
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7348679/
https://www.nejm.org/doi/full/10.1056/NEJMoa2030340
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https://www.nejm.org/doi/10.1056/NEJMoa2021436
https://www.nature.com/articles/d41586-020-01824-5
https://www.bmj.com/content/371/bmj.m4763
https://www.nature.com/articles/s41586-020-2918-0
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7686757/
https://pubmed.ncbi.nlm.nih.gov/23467492/
https://pubmed.ncbi.nlm.nih.gov/30632262/
https://www.ijidonline.com/article/S1201-9712(20)30470-7/pdf
https://www.researchgate.net/publication/344815353_Initial_Inoculum_and_the_Severity_of_COVID-19_A_Mathematical_Modeling_Study_of_the_Dose-Response_of_SARS-CoV-2_Infections
https://www.cidrap.umn.edu/news-perspective/2020/11/confronting-notion-face-masks-reduce-covid-dose

Image Sources:
https://www.istockphoto.com/photo/global-epidemics-and-economic-impact-gm1211119538-351106811
https://www.istockphoto.com/photo/abs-covid-19-antibody-gm1254123237-366470231
https://www.istockphoto.com/photo/caucasian-and-asian-male-and-female-doctor-wear-face-mask-talk-and-discuss-in-gm1298126676-391056124
https://www.istockphoto.com/photo/medical-ventilator-machine-gm1219641671-356823930
https://www.istockphoto.com/vector/hard-bed-soft-bed-and-body-gm871847950-145578825
https://www.istockphoto.com/photo/asian-healthcare-worker-wearing-medical-gown-while-filling-patient-information-about-gm1289304398-385023849
https://www.istockphoto.com/photo/box-with-pills-of-covid-19-immune-suppression-drug-gm1251004044-364966980
https://www.istockphoto.com/photo/remdesivir-bottle-for-treatment-of-covid-19-with-hand-holding-syringe-in-bottle-gm1254726699-366831286
https://www.istockphoto.com/photo/two-friends-holding-social-distance-during-walk-gm1225873299-360990055
https://www.istockphoto.com/photo/social-distancing-and-networking-gm1215988312-354398599
https://www.istockphoto.com/vector/stock-market-graph-crash-a-virus-gm1214059088-353071646

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