== Symptomer ==
{{Hovedartikel|COVID-19-pandemiens indvirkning på voksne|COVID-19-pandemiens indvirkning på børn|Senfølger af COVID-19}}
COVID-19 resulterer i [[influenza]]-lignende symptomer,<ref name=":0">{{Cite web|url=https://www.ecdc.europa.eu/en/novel-coronavirus-china/questions-answers|title=Q & A on novel coronavirus|website=European Centre for Disease Prevention and Control|language=en|access-date=2020-02-11}}</ref><ref name=":1">{{Cite web|url=https://www.health.gov.au/health-topics/novel-coronavirus-2019-ncov|title=Novel coronavirus (2019-nCoV)|last=Health|first=Australian Government Department of|date=2020-01-21|website=Australian Government Department of Health|language=en|access-date=2020-02-11}}</ref> inklusive [[feber]], [[hoste]], [[åndenød]], [[Myalgi|muskelsmerter]] og [[Udmattelse|træthed]]. COVID-19 kan resultere i [[blodprop]]per - selv i unge mennesker<ref>[https://sundhedspolitisktidsskrift.dk/nyheder/3351-intensivlaeger-advarer-covid-19-patienter-far-blodpropper-i-organerne.html 7. maj 2020, sundhedspolitisktidsskrift.dk: Intensivlæger advarer nu: Måske er COVID-19 ikke kun en lungesygdom ] Citat: "...mange patienter får blodpropper i hjerne, hjerte, nyrer, lunger og arme og ben...COVID-19 måske i virkeligheden er ligeså meget en vaskulær sygdom (en kredsløbssygdom, red.) som en respiratorisk sygdom. Eller om den måske ligefrem simpelthen er en vaskulær sygdom...", [https://web.archive.org/web/20200509062259/https://sundhedspolitisktidsskrift.dk/nyheder/3351-intensivlaeger-advarer-covid-19-patienter-far-blodpropper-i-organerne.html backup]</ref><ref>[https://www.bt.dk/udland/coronavirus-mistaenkt-for-at-foraarsage-slagtilfaelde-yngre-og-raske-kan-ogsaa 26. apr. 2020, bt.dk: Coronavirus mistænkt for at forårsage slagtilfælde: Yngre og raske kan også blive ramt] Citat: "...De amerikanske medier har de seneste dage skrevet om flere tilfælde med patienter under 50 år, som pludselig er blevet ramt af alvorlige blodpropper. Patienterne blev efterfølgende testet positive for covid-19. Det var personer, som kun havde milde symptomer på virussen, og som ikke i forvejen havde kroniske sygdomme eller af anden grund var i risikogruppen...", [https://web.archive.org/web/20200505012410/https://www.bt.dk/udland/coronavirus-mistaenkt-for-at-foraarsage-slagtilfaelde-yngre-og-raske-kan-ogsaa backup]</ref><ref>[https://www.sciencedaily.com/releases/2020/04/200423143100.htm Radiological Society of North America. (2020, April 23). New research highlights blood clot dangers of COVID-19. ScienceDaily] Citat: "... Journal References: Matthijs Oudkerk, Harry R Büller, Dirkjan Kuijpers, Nick van Es, Sitse F Oudkerk, Theresa C McLoud, Diederik Gommers, Jaap van Dissel, Hugo ten Cate, Edwin J van Beek. Diagnosis, Prevention, and Treatment of Thromboembolic Complications in COVID-19: Report of the National Institute for Public Health of the Netherlands. Radiology, 2020; 201629 DOI: [http://dx.doi.org/10.1148/radiol.2020201629 10.1148/radiol.2020201629] . Ian Leonard-Lorant, Xavier Delabranche, François Severac, Julie Helms, Coralie Pauzet, Olivier Collange, Françis Schneider, Aissam Labani, Pascal Bilbault, Sébastien Moliere, Pierre Leyendecker, Catherine Roy, Mickaël Ohana. Acute Pulmonary Embolism in COVID-19 Patients on CT Angiography and Relationship to D-Dimer Levels. Radiology, 2020; 201561 DOI: [http://dx.doi.org/10.1148/radiol.2020201561 10.1148/radiol.2020201561] . Franck Grillet, Julien Behr, Paul Calame, Sébastien Aubry, Eric Delabrousse. Acute Pulmonary Embolism Associated with COVID-19 Pneumonia Detected by Pulmonary CT Angiography. Radiology, 2020; 201544 DOI: [http://dx.doi.org/10.1148/radiol.2020201544 10.1148/radiol.2020201544] . Nadia Lushina, John S. Kuo, Hamza A. Shaikh. Pulmonary, Cerebral, and Renal Thromboembolic Disease Associated with COVID-19 Infection. Radiology, 2020; 201623 DOI: [http://dx.doi.org/10.1148/radiol.2020201623 10.1148/radiol.2020201623] ...", [https://web.archive.org/web/20200505200558/https://www.sciencedaily.com/releases/2020/04/200423143100.htm backup]</ref><ref>[https://www.webmd.com/lung/news/20200424/blood-clots-are-another-dangerous-covid-19-mystery April 24, 2020, webmd.com: Blood Clots Are Another Dangerous COVID-19 Mystery] Citat: "...Clots are causing patients with COVID to have heart attacks and strokes; form strange rashes on their skin; and get red, swollen wounds that look like frostbite on their fingers and toes. On autopsy, the small vessels of the lungs and bowels, liver, and kidneys of COVID patients are choked with clots...For example, certain conditions like high blood pressure, diabetes, and heart disease stress the endothelium. It’s no surprise, then, that people who have these conditions are also the ones who get the sickest when they catch COVID-19...The bottom line, he says, is that clotting is a feature of the COVID-19 syndrome...", [https://web.archive.org/web/20200507185016/https://www.webmd.com/lung/news/20200424/blood-clots-are-another-dangerous-covid-19-mystery backup]</ref><ref>[https://www.livescience.com/coronavirus-blood-clots.html 23 April 2020, livescience.com: Mysterious blood clots in COVID-19 patients have doctors alarmed] Citat: "...Reports are also surfacing of relatively young people, in their 30s and 40s, who are having strokes after being infected with the new coronavirus, according to CNN...", [https://web.archive.org/web/20200506172422/https://www.livescience.com/coronavirus-blood-clots.html backup]</ref><ref>[https://www.nature.com/articles/d41586-020-01403-8 08 May 2020, nature.com: Coronavirus blood-clot mystery intensifies. Research begins to pick apart the mechanisms behind a deadly COVID-19 complication] Citat: "...Studies from the Netherlands and France suggest that clots appear in 20% to 30% of critically ill COVID-19 patients1,2...Blood thinners don’t reliably prevent clotting in people with COVID-19, and young people are dying of strokes caused by the blockages in the brain...", [https://web.archive.org/web/20200509053010/https://www.nature.com/articles/d41586-020-01403-8 backup]</ref><ref>[https://press.rsna.org/timssnet/media/pressreleases/14_pr_target.cfm?ID=2173 April 23, 2020, rsna.org: New Research Highlights Blood Clot Dangers of COVID-19] Citat "...“COVID-19 is more than a lung infection,” Professor van Beek said. “It affects the vasculature of the lungs and other organs and has a high thrombosis risk with acute life-threatening events that require adequate treatment with anticoagulants based on laboratory monitoring with appropriate imaging tests as required...", [https://web.archive.org/web/20200509053237/https://press.rsna.org/timssnet/media/pressreleases/14_pr_target.cfm?ID=2173 backup]</ref><ref>[https://www.mdedge.com/cardiology/article/221948/coronavirus-updates/evidence-builds-linking-anticoagulation-covid-19 May 8, 2020, mdedge.com: Evidence builds linking anticoagulation to COVID-19 survival] Citat: "...Among nearly 3,000 patients with COVID-19 admitted to New York City’s Mount Sinai Health System beginning in mid-March, median survival increased from 14 days to 21 days with the addition of anticoagulation. The results were particularly striking among sicker patients who required mechanical ventilation, in whom in-hospital mortality fell from 62.7% to 29.1% and median survival jumped from 9 days to 21 days...Interestingly, the association with anticoagulation and improved survival remained even after adjusting for mechanical ventilation, [http://www.onlinejacc.org/content/early/2020/05/05/j.jacc.2020.05.001 the authors reported May 6 in the Journal of the American College of Cardiology]...", [https://web.archive.org/web/20200509052606/https://www.mdedge.com/cardiology/article/221948/coronavirus-updates/evidence-builds-linking-anticoagulation-covid-19 backup]</ref>, [[lungebetændelse]], [[akut lungesvigt]] (ARDS), [[sepsis]] og [[shock|septisk shock]] - og muligvis [[død]].<ref name=":0" />
Vira