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Endemic (epidemiology)

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level, without extra infections being brought into the group as a result of travel or similar means. The term describes the distribution (spread) of an infectious disease among a group of people or within a populated area. An endemic disease always has a steady, predictable number of people getting
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but the infection is said to be in an endemic steady state. An infection that starts as an epidemic will eventually either die out (with the possibility of it resurging in a theoretically predictable cyclical manner) or reach the endemic steady state, depending on a number of factors, including the
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means the disease severity would necessarily be mild. Endemic COVID-19 could be mild if previously acquired immunity reduces the risk of death and disability during future infections, but in itself endemicity only means that there will be a steady, predictable number of sick people.
121:). Consequently, the number of people infected by malaria in the UK is too variable to be called endemic. However, the number of people who get chickenpox in the UK varies little from year to year, so chickenpox is considered endemic in the UK. 139:
For an infection that relies on person-to-person transmission, to be endemic, each person who becomes infected with the disease must pass it on to one other person on average. Assuming a completely susceptible population, that means that the
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An endemic disease with a moderate rate of infection. This term is often used to describe the prevalence of malaria in a local area, with 10 to 50% of children showing evidence of prior infection being considered a moderate level for that
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Ticona, Eduardo; Gao, George Fu; Zhou, Lei; Burgos, Marcos (13 April 2023). "Person-Centered Infectious Diseases and Pandemics". In Mezzich, Juan E.; Appleyard, James; Glare, Paul; Snaedal, Jon; Wilson, Ruth (eds.).
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Yes, common colds are endemic. So are Lassa fever, malaria and polio. So was smallpox, until vaccines stamped it out. learning to live with endemic rotavirus, hepatitis C or measles.
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An endemic disease with an extremely high rate of infection, especially a disease that infects nearly everyone early in life, so that nearly all adults have developed some level of
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for the epidemic. Based on the reproduction number, we can define the epidemic waves, such as the first wave, second wave, etc. for COVID-19 in different regions and countries.
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is not. Every year, there are a few cases of malaria reported in the UK, but these do not lead to sustained transmission in the population due to the lack of a suitable
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is endemic in some countries, meaning that it is regularly found in an area, this is a use of the word in its etymological, rather than epidemiological or
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Terms used to describe distribution include: Endemic: a condition that is generally present in a group or area, such as a cold
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An epidemic, especially one affecting a very small area, such as the people in one town or attending a single event. The
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A disease that appears occasionally, but, unlike endemic disease, is not always present at a steady and predictable level.
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being susceptible to it, effectively discounting the immune sector of the population. So, for a disease to be in an
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A new disease that is spreading or a previously endemic disease whose infection rate is increasing significantly.
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If a disease is in an endemic steady state in a population, the relation above allows us to estimate the
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An endemic disease with a high rate of infection, especially one affecting people of all ages equally.
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Porta, Miquel S.; Greenland, Sander; Hernán, Miguel; Silva, Isabel dos Santos; Last, John M. (2014).
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An epidemic affecting a very large part of the world, generally multiple countries or multiple
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Zhang, Stephen X.; Marioli, Francisco Arroyo; Gao, Renfei; Wang, Senhu (13 September 2021).
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In this way, the infection neither dies out nor does the number of infected people increase
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This is a short, incomplete list of some infections that are usually considered endemic:
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Cook, Neal; Shepherd, Andrea; Dunleavy, Stephanie; McCauley, Claire (23 April 2022).
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showed a normally endemic disease causing an epidemic outbreak, primarily among
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Emch, Michael; Root, Elisabeth Dowling; Carrel, Margaret (20 February 2017).
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individuals, the basic reproduction number multiplied by the proportion of
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Katzourakis A (January 2022). "COVID-19: endemic doesn't mean harmless".
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Katzourakis A (January 2022). "COVID-19: endemic doesn't mean harmless".
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was an endemic disease until it was eradicated through vaccination.
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is endemic (steady state) in the United Kingdom, but
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(6 October 2016). 2148:Ear-Nose-Throat/Upper respiratory tract 1321:Access to water, sanitation and hygiene 942:Clay's Handbook of Environmental Health 507: 271:Some in the public wrongly assume that 2731:Infectious disease (medical specialty) 2623:Antimicrobial resistance surveillance 131:Mathematical modelling in epidemiology 918:. Guilford Publications. p. 22. 907: 905: 756:Antia R, Halloran ME (October 2021). 711:Risk Management and Healthcare Policy 260:While it might be common to say that 7: 1978:Compartmental models in epidemiology 885:WHO Malaria Terminology, 2021 update 851: 849: 847: 819: 817: 815: 813: 811: 809: 807: 805: 803: 801: 573: 571: 569: 567: 565: 329:Categories for non-endemic diseases 324:is a hypoendemic disease in the US. 86:sick, but that number can be high ( 939:Battersby, Stephen (1 July 2016). 830:. Academic Press. pp. 26–27. 676:10.1016/b978-0-32-395389-4.00016-5 491:Eradication of infectious diseases 367:frequently appears as an epidemic. 45:known to infect humans. It causes 25: 2727:Economics of Infectious Diseases 1037: 664:"Temporal dynamics of epidemics" 945:. Routledge. pp. 415–416. 539:"Health and Disease in Society" 211:{\displaystyle R_{0}\times S=1} 156:individuals in the population ( 2736:Infectious disease informatics 2567:Transmission-based precautions 670:, Elsevier, pp. 217–255, 285:Categories of endemic diseases 1: 2153:Chest/Lower respiratory tract 1928:Ocular (Eye) mucosal membrane 1289:Behavioral/lifestyle factors 1042:The dictionary definition of 662:von Csefalvay, Chris (2023), 1715:Aerosol-generating procedure 1493:Silent/Subclinical infection 1193:Multidrug-resistant bacteria 859:A Dictionary of Epidemiology 774:10.1016/j.immuni.2021.09.019 497:Vaccine-preventable diseases 471: 459: 2379:Vaccine-preventable disease 2327:Monoclonal antibody therapy 381:sometimes a global pandemic 349:2019–2020 measles outbreaks 2800: 2520:Respiratory source control 1003:10.1038/d41586-022-00155-x 600:10.1038/d41586-022-00155-x 545:. SAGE. pp. 114–115. 465: 453: 128: 125:Mathematical determination 2664:Global Health Initiatives 2654:Evolutionary epidemiology 2349:Post-exposure prophylaxis 2285:Antimicrobial stewardship 2008:Multiplicity of infection 1973:Basic reproduction number 1749:Percutaneous inoculation 1233:Host–pathogen interaction 142:basic reproduction number 115:(mosquitoes of the genus 2482:Protective sequestration 2344:Pre-exposure prophylaxis 1635:Generational difference 1188:Horizontal gene transfer 1178:Antimicrobial resistance 635:Person Centered Medicine 51:shingles (herpes zoster) 38:Human alphaherpesvirus 3 2669:Microbial phylogenetics 2587:Wastewater surveillance 2108:Geographic distribution 1983:Critical community size 1781:Surgical site infection 1629:Iatrogenic/Medical care 1548:Microbial translocation 1544:Endogenous reactivation 1539:Normal flora overgrowth 1488:Opportunistic infection 1260:Opportunistic infection 230:of the disease and its 2741:Microbial bioterrorism 2364:efficacy/effectiveness 1772:Surgical intervention 1664:Breakthrough infection 1286:Genetic predisposition 1270:Susceptible individual 1117:Germ theory of disease 212: 54: 47:chickenpox (varicella) 2577:Universal precautions 1535:Endogenous overgrowth 1387:Poultry and livestock 213: 35: 2679:Genomic reassortment 2659:Genetic epidemiology 2498:Health communication 2426:Flattening the curve 2416:Disease surveillance 2199:Systemic/Generalized 1963:Animal disease model 1443:Asymptomatic carrier 724:10.2147/RMHP.S326051 232:mode of transmission 183: 170:endemic steady state 2746:Pandemic prevention 2702:Viral phylodynamics 2683:Re-emerging disease 2572:Travel restrictions 1776:Postoperative wound 1745:Blood-borne disease 1727:Respiratory droplet 1639:Vertical/Congenital 1624:Nosocomial/Hospital 1581:Spillover infection 995:2022Natur.601..485K 592:2022Natur.601..485K 463:, "in, within" and 379:. Seasonal flu is 174:endemic equilibrium 2692:Selection pressure 1988:Force of infection 1616:Contagious disease 1551:Endogenous seeding 1448:Chain of infection 1372:Injection drug use 1283:Vaccination status 1166:Case fatality rate 1084:infectious disease 250:mathematical model 208: 55: 2766: 2765: 2756:Tropical medicine 2697:Synthetic biology 2598: 2597: 2557:Social distancing 2510:Outbreak response 2131: 2130: 1958:Agent-based model 1944: 1943: 1940: 1939: 1936: 1935: 1483:Natural reservoir 1473:Infectious period 1463:Incubation period 1420: 1419: 1376:Natural disaster 1345:Tropical diseases 1328:Biodiversity loss 1265:Risk of infection 1255:Microbiome health 1248:Immunosuppression 952:978-1-317-38291-1 925:978-1-4625-2006-0 895:978-92-4-003840-0 869:978-0-19-997673-7 837:978-0-12-803708-9 768:(10): 2172–2176. 685:978-0-323-95389-4 648:978-3-031-17650-0 552:978-1-5297-8581-4 16:(Redirected from 2791: 2751:Tropical disease 2687:Reverse zoonosis 2674:One Health Model 2503:Health education 2492:Community health 2411:Cordon sanitaire 2384:Ring vaccination 2354:Repurposed drugs 2241: 2160:Gastrointestinal 2003:Machine learning 1807:Gastrointestinal 1758:Intravenous line 1695: 1609:/Cross-infection 1596:Reverse zoonosis 1569: 1526: 1431: 1412:War and conflict 1280:Nutrition status 1243:Immunodeficiency 1100: 1076: 1069: 1062: 1053: 1041: 1026: 1025: 978: 957: 956: 936: 930: 929: 909: 900: 899: 880: 874: 873: 853: 842: 841: 821: 796: 795: 785: 753: 747: 746: 736: 726: 702: 696: 695: 694: 692: 659: 653: 652: 629: 620: 619: 575: 560: 559: 534: 528: 527: 525: 523: 512: 474: 468: 467: 462: 456: 455: 273:endemic COVID-19 217: 215: 214: 209: 195: 194: 176:, it holds that 21: 2799: 2798: 2794: 2793: 2792: 2790: 2789: 2788: 2769: 2768: 2767: 2762: 2706: 2619:Antigenic shift 2614:Antigenic drift 2605: 2594: 2458:Barrier nursing 2406:Contact tracing 2397: 2390: 2235: 2233: 2226: 2137: 2127: 2028: 2022: 2013:Serial interval 1932: 1916: 1907:Cervico-vaginal 1902: 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2459: 2456: 2455: 2454: 2451: 2447: 2444: 2442: 2439: 2437: 2434: 2433: 2432: 2429: 2427: 2424: 2422: 2419: 2417: 2414: 2412: 2409: 2407: 2404: 2403: 2401: 2399: 2393: 2385: 2382: 2380: 2377: 2375: 2372: 2370: 2367: 2365: 2362: 2361: 2360: 2357: 2355: 2352: 2350: 2347: 2345: 2342: 2340: 2339:Phage therapy 2337: 2335: 2332: 2328: 2325: 2324: 2323: 2322:Immunotherapy 2320: 2318: 2315: 2313: 2310: 2308: 2305: 2303: 2300: 2298: 2295: 2293: 2290: 2286: 2283: 2282: 2281: 2280:Antimicrobial 2278: 2274: 2271: 2270: 2269: 2266: 2264: 2261: 2257: 2254: 2253: 2252: 2249: 2248: 2246: 2242: 2239: 2237: 2229: 2222: 2220: 2217: 2215: 2212: 2210: 2207: 2205: 2202: 2200: 2197: 2194: 2192: 2189: 2187: 2184: 2181: 2179: 2176: 2173: 2171:Genitourinary 2170: 2166: 2163: 2162: 2161: 2158: 2154: 2151: 2149: 2146: 2145: 2143: 2142: 2140: 2134: 2124: 2121: 2119: 2116: 2114: 2111: 2109: 2106: 2104: 2101: 2099: 2096: 2094: 2091: 2089: 2086: 2084: 2081: 2079: 2076: 2074: 2071: 2069: 2066: 2064: 2061: 2057: 2054: 2052: 2049: 2048: 2047: 2044: 2042: 2039: 2037: 2034: 2033: 2031: 2029:in population 2025: 2019: 2016: 2014: 2011: 2009: 2006: 2004: 2001: 1999: 1996: 1994: 1993:Herd immunity 1991: 1989: 1986: 1984: 1981: 1979: 1976: 1974: 1971: 1969: 1966: 1964: 1961: 1959: 1956: 1955: 1953: 1951: 1947: 1929: 1926: 1925: 1923: 1919: 1912: 1911: 1909: 1905: 1898: 1897: 1895: 1891: 1885: 1882: 1881: 1879: 1877:Genitourinary 1875: 1869: 1865: 1863: 1860: 1858: 1855: 1853: 1850: 1849: 1847: 1843: 1837: 1834: 1832: 1829: 1827: 1824: 1820: 1819:Contamination 1817: 1816: 1815: 1812: 1811: 1809: 1805: 1797: 1794: 1792: 1789: 1788: 1787:Vector-borne 1786: 1782: 1779: 1777: 1774: 1773: 1771: 1767: 1764: 1761: 1759: 1756: 1754: 1751: 1750: 1748: 1746: 1743: 1742: 1740: 1734: 1728: 1725: 1723: 1720: 1716: 1713: 1712: 1711: 1708: 1706: 1703: 1702: 1700: 1696: 1693: 1689: 1683: 1680: 1679: 1677: 1671: 1665: 1662: 1658: 1655: 1651: 1648: 1645: 1642: 1641: 1640: 1637: 1636: 1634: 1630: 1627: 1625: 1622: 1621: 1619: 1617: 1614: 1613: 1611: 1607: 1603: 1597: 1594: 1592: 1589: 1587: 1584: 1582: 1579: 1578: 1576: 1574: 1573:Cross-species 1570: 1567: 1563: 1556: 1553: 1550: 1547: 1545: 1542: 1540: 1537: 1534: 1533: 1531: 1527: 1524: 1520: 1514: 1513:Window period 1511: 1509: 1506: 1504: 1501: 1499: 1496: 1494: 1491: 1489: 1486: 1484: 1481: 1479: 1478:Latent period 1476: 1474: 1471: 1469: 1466: 1464: 1461: 1459: 1456: 1454: 1451: 1449: 1446: 1444: 1441: 1440: 1438: 1432: 1429: 1427: 1423: 1413: 1410: 1408: 1405: 1403: 1400: 1398: 1395: 1393: 1390: 1388: 1385: 1381: 1378: 1377: 1375: 1373: 1370: 1368: 1365: 1363: 1360: 1358: 1357:Deforestation 1355: 1353: 1350: 1346: 1343: 1341: 1338: 1337: 1335: 1333: 1330: 1327: 1324: 1322: 1319: 1318: 1316: 1314: 1310: 1302:Stress levels 1301: 1298: 1294: 1291: 1290: 1288: 1285: 1282: 1279: 1276: 1273: 1272: 1271: 1268: 1266: 1263: 1261: 1258: 1256: 1253: 1249: 1246: 1244: 1241: 1240: 1239: 1236: 1234: 1231: 1229: 1226: 1224: 1221: 1219: 1216: 1215: 1213: 1211: 1207: 1201: 1198: 1194: 1191: 1189: 1186: 1184: 1181: 1180: 1179: 1176: 1172: 1169: 1167: 1164: 1162: 1159: 1157: 1154: 1153: 1152: 1149: 1147: 1144: 1140: 1137: 1136: 1135: 1134:Pathogenicity 1132: 1128: 1125: 1124: 1123: 1120: 1118: 1115: 1113: 1110: 1109: 1107: 1105: 1101: 1098: 1094: 1089: 1085: 1077: 1072: 1070: 1065: 1063: 1058: 1057: 1054: 1048:at Wiktionary 1047: 1046: 1040: 1036: 1035: 1031: 1024: 1020: 1016: 1012: 1008: 1004: 1000: 996: 992: 989:(7894): 485. 988: 984: 977: 975: 973: 971: 969: 967: 965: 963: 959: 954: 948: 944: 943: 935: 932: 927: 921: 917: 916: 908: 906: 902: 897: 891: 887: 886: 879: 876: 871: 865: 861: 860: 852: 850: 848: 844: 839: 833: 829: 828: 820: 818: 816: 814: 812: 810: 808: 806: 804: 802: 798: 793: 789: 784: 779: 775: 771: 767: 763: 759: 752: 749: 744: 740: 735: 730: 725: 720: 717:: 3775–3782. 716: 712: 708: 701: 698: 687: 681: 677: 673: 669: 665: 658: 655: 650: 644: 640: 636: 628: 626: 622: 617: 613: 609: 605: 601: 597: 593: 589: 586:(7894): 485. 585: 581: 574: 572: 570: 568: 566: 562: 558: 554: 548: 544: 540: 533: 530: 517: 511: 508: 502: 498: 495: 492: 489: 486: 483: 482: 478: 476: 473: 461: 450: 446: 438: 436: 434: 428: 425: 423: 420: 418: 415: 413: 410: 408: 405: 403: 400: 398: 395: 394: 393: 387: 382: 378: 374: 372: 369: 366: 362: 360: 357: 354: 350: 346: 344: 341: 338: 336: 333: 332: 328: 323: 322:Typhoid fever 319: 316: 312: 309: 306: 304: 301: 298: 294: 292: 289: 288: 284: 280:Related terms 279: 277: 274: 269: 267: 263: 255: 253: 251: 247: 243: 235: 233: 229: 224: 223:exponentially 205: 202: 199: 196: 191: 187: 179: 178: 177: 175: 171: 167: 163: 159: 155: 151: 143: 136: 132: 124: 122: 120: 119: 114: 110: 106: 103:For example, 101: 99: 95: 91: 90: 84: 80: 76: 72: 68: 64: 60: 52: 48: 44: 40: 39: 34: 30: 19: 2779:Epidemiology 2470:Notification 2441:Hand washing 2436:Food hygiene 2421:Disinfection 2317:Immunization 2268:Anthelmintic 2256:prophylactic 2144:Respiratory 2068:Hyperendemic 2040: 2018:WAIFW matrix 1673:Environment- 1426:Transmission 1402:Urbanization 1200:Host tropism 1096:Determinants 1082:Concepts in 1044: 1022: 986: 982: 941: 934: 914: 884: 878: 858: 826: 765: 761: 751: 714: 710: 700: 689:, retrieved 667: 657: 634: 583: 579: 556: 542: 532: 520:. Retrieved 510: 475:, "people". 444: 442: 431: 391: 365:Seasonal flu 353:unvaccinated 303:Hyperendemic 270: 259: 236: 220: 173: 169: 157: 138: 116: 102: 93: 89:hyperendemic 87: 66: 59:epidemiology 56: 37: 29: 2723:Eradication 2634:Biosecurity 2359:Vaccination 2334:Inoculation 2312:Drug safety 2307:Combination 2234:and Control 2182:Soft tissue 2136:Anatomical 2103:Seasonality 2083:Mesoendemic 2063:Holoendemic 2056:Farr's laws 1968:Attack rate 1766:Animal bite 1762:Insect bite 1698:Respiratory 1325:Air quality 1313:Environment 1223:Comorbidity 1139:Attack rate 1122:Infectivity 691:28 February 422:Hepatitis C 402:Lassa fever 397:Common cold 317:Hypoendemic 310:Mesoendemic 291:Holoendemic 166:transmitted 162:probability 154:susceptible 94:hypoendemic 43:herpesvirus 41:virion − a 2784:Prevention 2773:Categories 2606:infections 2547:Sanitation 2515:Quarantine 2374:resistance 2292:Antiseptic 2273:Ascaricide 2263:Antifungal 2251:Antibiotic 2232:Prevention 2165:Intestinal 2098:Prevalence 2078:Inequality 2027:Occurrence 1826:Breastmilk 1710:Bioaerosol 1682:Sapronosis 1657:Horizontal 1529:Endogenous 1508:Viral load 1468:Index case 764:(Review). 503:References 377:continents 266:ecological 129:See also: 105:chickenpox 92:) or low ( 77:when that 71:population 53:in adults. 2718:Discovery 2644:Disease X 2604:Emerging 2552:Screening 2453:Isolation 2297:Antiviral 2123:Twindemic 2073:Incidence 1950:Modelling 1913:Perinatal 1845:Cutaneous 1736:Linked to 1646:Perinatal 1565:Exogenous 1557:formation 1299:Pregnancy 1156:Endotoxin 1151:Virulence 1019:246277859 616:246277859 443:The word 439:Etymology 417:Rotavirus 246:parameter 228:virulence 197:× 118:Anopheles 79:infection 63:infection 2627:EARS-Net 2542:Safe sex 2494:services 2465:Lockdown 2236:measures 2138:location 2118:Syndemic 2113:Sporadic 2093:Pandemic 2088:Outbreak 2046:Epidemic 1899:Prenatal 1791:Mosquito 1675:to-human 1650:Neonatal 1643:Prenatal 1591:Zoonosis 1436:concepts 1367:Humidity 1352:Commerce 1228:Diabetes 1161:Exotoxin 1011:35075305 792:34626549 762:Immunity 743:34548826 608:35075305 522:19 April 485:Syndemic 479:See also 433:Smallpox 388:Examples 371:Pandemic 359:Epidemic 343:Outbreak 335:Sporadic 314:disease. 297:immunity 268:, form. 98:epidemic 83:baseline 2431:Hygiene 2369:booster 2302:Asepsis 2041:Endemic 2036:Cluster 1620:Source 1555:Biofilm 1392:Poverty 1362:Ecology 1340:El Niño 1293:Smoking 1171:factors 1112:Biofilm 1088:Outline 1045:endemic 991:Bibcode 783:8461290 734:8448159 588:Bibcode 445:endemic 427:Measles 407:Malaria 355:people. 109:malaria 67:endemic 2639:CRISPR 2591:Zoning 2446:Gloves 1857:Fomite 1691:Routes 1586:Vector 1453:Fomite 1434:Basic 1397:Travel 1277:Gender 1017:  1009:  983:Nature 949:  922:  892:  866:  834:  790:  780:  741:  731:  682:  645:  614:  606:  580:Nature 549:  256:Misuse 150:immune 113:vector 2711:Other 2219:Fetus 2214:Mouth 2209:Tooth 2204:Blood 2191:Joint 2051:Curve 1921:Other 1868:wound 1866:Open 1836:Feces 1831:Water 1522:Modes 1380:Flood 1104:Agent 1015:S2CID 612:S2CID 472:demos 466:δῆμος 449:Greek 412:Polio 61:, an 2475:list 2396:Non- 2186:Bone 2178:Skin 1862:Soil 1852:Burn 1814:Food 1796:Tick 1458:Host 1218:Burn 1210:Host 1007:PMID 947:ISBN 920:ISBN 890:ISBN 864:ISBN 832:ISBN 788:PMID 739:PMID 693:2023 680:ISBN 643:ISBN 604:PMID 547:ISBN 524:2018 262:AIDS 133:and 2535:PPE 2223:Eye 1884:Sex 1705:Air 1274:Age 999:doi 987:601 778:PMC 770:doi 729:PMC 719:doi 672:doi 596:doi 584:601 172:or 73:or 57:In 2775:: 1021:. 1013:. 1005:. 997:. 985:. 961:^ 904:^ 846:^ 800:^ 786:. 776:. 766:54 760:. 737:. 727:. 715:14 713:. 709:. 678:, 666:, 637:. 624:^ 610:. 602:. 594:. 582:. 564:^ 555:. 541:. 469:, 460:en 457:, 454:ἐν 451:: 234:. 144:(R 100:. 1090:) 1086:( 1075:e 1068:t 1061:v 1001:: 993:: 955:. 928:. 898:. 872:. 840:. 794:. 772:: 745:. 721:: 674:: 651:. 618:. 598:: 590:: 526:. 383:. 299:. 241:0 239:R 206:1 203:= 200:S 192:0 188:R 158:S 146:0 20:)

Index

Endemic disease

Human alphaherpesvirus 3
herpesvirus
chickenpox (varicella)
shingles (herpes zoster)
epidemiology
infection
population
populated place
infection
baseline
hyperendemic
epidemic
chickenpox
malaria
vector
Anopheles
Mathematical modelling in epidemiology
Mathematical modelling of infectious disease
basic reproduction number
immune
susceptible
probability
transmitted
exponentially
virulence
mode of transmission
R0
parameter

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