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Data of meteorology, ambient atmospheric pollutants, and the incidence of allergic conjunctivitis (IAC) in prefecture-level cities between the years 2014 and 2018 are analyzed. The results show an increasing trend in the AC of average growth rate per annum 7.6%, with the highest incidence in the provincial capitals. The IAC is positively correlated with atmospheric pollutants (i.e., PM<jats:sub>2.5<\/jats:sub>, PM<jats:sub>10<\/jats:sub>, CO, SO<jats:sub>2<\/jats:sub>, NO<jats:sub>2<\/jats:sub>, and O<jats:sub>3<\/jats:sub>) and meteorological factors (i.e., air temperature and wind speed), but negatively correlated with relative humidity. These results suggest that the IAC is directly proportional to pollution level and climatic conditions, and also the precedence of air pollution. We have further obtained the threshold values of atmospheric pollutants concentration and meteorological factors, a turning point above which more AC may be induced. Compared with the air quality standard advised by China and the World Health Organization (WHO), both thresholds of PM<jats:sub>10<\/jats:sub> (70\u2009\u03bcg\u2009m<jats:sup>\u22123<\/jats:sup>) and PM<jats:sub>2.5<\/jats:sub> (45\u2009\u03bcg\u2009m<jats:sup>\u22123<\/jats:sup>) are higher than current standards and pose a less environmental risk for the IAC. SO<jats:sub>2<\/jats:sub> threshold (23\u2009\u03bcg\u2009m<jats:sup>\u22123<\/jats:sup>) is comparable to the WHO standard and significantly lower than that of China\u2019s, indicating greater environmental risks in China. Both thresholds of NO<jats:sub>2<\/jats:sub> (27\u2009\u03bcg\u2009m<jats:sup>\u22123<\/jats:sup>) and O<jats:sub>3<\/jats:sub> (88\u2009\u03bcg\u2009m<jats:sup>\u22123<\/jats:sup>) are below current standards, indicating that they are major environmental risk factors for the IAC. Our findings highlight the importance of atmospheric environmental protection and reference for health-based amendment.<\/jats:p>","DOI":"10.1038\/s41377-021-00630-6","type":"journal-article","created":{"date-parts":[[2021,9,17]],"date-time":"2021-09-17T09:06:20Z","timestamp":1631869580000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":84,"title":["Air pollution and meteorological conditions significantly contribute to the worsening of allergic conjunctivitis: a regional 20-city, 5-year study in Northeast China"],"prefix":"10.1038","volume":"10","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-4335-4813","authenticated-orcid":false,"given":"Cheng-Wei","family":"Lu","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jing","family":"Fu","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xiu-Fen","family":"Liu","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Wei-Wei","family":"Chen","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ji-Long","family":"Hao","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xiao-Lan","family":"Li","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Om Prakash","family":"Pant","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2021,9,17]]},"reference":[{"key":"630_CR1","doi-asserted-by":"publisher","unstructured":"Heuson, C. 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