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First, young children are largely spared from severe disease. Second, numerous countries have COVID-19 death rates that are as low as 1% of the death rates of other countries. Third, many people, despite prolonged close contact with someone who is COVID-19 positive, never test positive themselves. Fourth, nearly half of people who test positive for COVID-19 are asymptomatic. Some researchers have theorized that the measles-mumps-rubella (MMR) vaccine may be responsible for these disparities. The significance of our study is that it showed that mumps titers related to the MMR II vaccine are significantly and inversely correlated with the severity of COVID-19-related symptoms, supporting the theorized association between the MMR vaccine and COVID-19 severity.<\/jats:p>","DOI":"10.1128\/mbio.02628-20","type":"journal-article","created":{"date-parts":[[2020,11,23]],"date-time":"2020-11-23T12:52:04Z","timestamp":1606135924000},"update-policy":"https:\/\/doi.org\/10.1128\/asmj-crossmark-policy-page","source":"Crossref","is-referenced-by-count":67,"title":["Analysis of Measles-Mumps-Rubella (MMR) Titers of Recovered COVID-19 Patients"],"prefix":"10.1128","volume":"11","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-8388-6799","authenticated-orcid":false,"given":"Jeffrey E.","family":"Gold","sequence":"first","affiliation":[{"name":"World Organization, Watkinsville, Georgia, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"William H.","family":"Baumgartl","sequence":"additional","affiliation":[{"name":"Nevada Spine Center, Las Vegas, Nevada, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ramazan A.","family":"Okyay","sequence":"additional","affiliation":[{"name":"Kahramanmara\u015f S\u00fct\u00e7\u00fc \u0130mam University, Kahramanmara\u015f, Turkey"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Warren E.","family":"Licht","sequence":"additional","affiliation":[{"name":"Warren Alpert Medical School of Brown University, Providence, Rhode Island, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8066-5763","authenticated-orcid":false,"suffix":"Jr.","given":"Paul L.","family":"Fidel","sequence":"additional","affiliation":[{"name":"Louisiana State University Health Sciences Center, New Orleans, Louisiana, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mairi C.","family":"Noverr","sequence":"additional","affiliation":[{"name":"Tulane University School of Medicine, New Orleans, Louisiana, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Larry P.","family":"Tilley","sequence":"additional","affiliation":[{"name":"VetMed Consultants, Inc., Santa Fe, New Mexico, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"David J.","family":"Hurley","sequence":"additional","affiliation":[{"name":"College of Veterinary Medicine, University of Georgia, Athens, Georgia, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9742-4955","authenticated-orcid":false,"given":"Bal\u00e1zs","family":"Rada","sequence":"additional","affiliation":[{"name":"College of Veterinary Medicine, University of Georgia, Athens, Georgia, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"John W.","family":"Ashford","sequence":"additional","affiliation":[{"name":"Stanford University, Stanford, California, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"235","reference":[{"key":"e_1_3_2_2_2","doi-asserted-by":"publisher","DOI":"10.3389\/fmolb.2020.00120"},{"key":"e_1_3_2_3_2","doi-asserted-by":"publisher","DOI":"10.1080\/21645515.2020.1773141"},{"key":"e_1_3_2_4_2","doi-asserted-by":"publisher","DOI":"10.1080\/14787210.2020.1782742"},{"key":"e_1_3_2_5_2","doi-asserted-by":"publisher","DOI":"10.1016\/j.mehy.2020.109849"},{"key":"e_1_3_2_6_2","doi-asserted-by":"crossref","unstructured":"Pawlowski C Puranik A Bandi H Venkatakrishnan AJ Agarwal V Kennedy R O\u2019Horo JC Gorres GJ Williams AW Halamka J Badley AD Soundararajan V. 2020. 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