{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,11,2]],"date-time":"2025-11-02T10:33:31Z","timestamp":1762079611926,"version":"build-2065373602"},"reference-count":40,"publisher":"MDPI AG","issue":"24","license":[{"start":{"date-parts":[[2022,12,19]],"date-time":"2022-12-19T00:00:00Z","timestamp":1671408000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Brazilian Ministry of Health","award":["54\/2017"],"award-info":[{"award-number":["54\/2017"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["IJERPH"],"abstract":"<jats:p>Background: The \u201cSyphilis No!\u201d campaign the Brazilian Ministry of Health (MoH) launched between November 2018 and March 2019, brought forward the concept \"Test, Treat and Cure\" to remind the population of the importance of syphilis prevention. In this context, this study aims to analyze the similarity of syphilis online news to comprehend how public health communication interventions influence media coverage of the syphilis issue. Methods: This paper presented a computational approach to assess the effectiveness of communication actions on a public health problem. Data were collected between January 2015 and December 2019 and processed using the Hermes ecosystem, which utilizes text mining and machine learning algorithms to cluster similar content. Results: Hermes identified 1049 google-indexed web pages containing the term \u2019syphilis\u2019 in Brazil. Of these, 619 were categorized as news stories. In total, 157 were grouped into clusters of at least two similar news items and a single cluster with 462 news classified as \u201csingle\u201d for not featuring similar news items. From these, 19 clusters were identified in the pre-campaign period, 23 during the campaign, and 115 in the post-campaign. Conclusions: The findings presented in this study show that the volume of syphilis-related news reports has increased in recent years and gained popularity after the SNP started, having been boosted during the campaign and escalating even after its completion.<\/jats:p>","DOI":"10.3390\/ijerph192417049","type":"journal-article","created":{"date-parts":[[2022,12,19]],"date-time":"2022-12-19T05:55:43Z","timestamp":1671429343000},"page":"17049","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Similarity Analysis in Understanding Online News in Response to Public Health Crisis"],"prefix":"10.3390","volume":"19","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-9786-7134","authenticated-orcid":false,"given":"Sidemar","family":"Cezario","sequence":"first","affiliation":[{"name":"Department of Informatics and Applied Mathematics, Federal University of Rio Grande do Norte, Natal 59078-900, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7652-4463","authenticated-orcid":false,"given":"Thiago","family":"Marques","sequence":"additional","affiliation":[{"name":"Department of Informatics and Applied Mathematics, Federal University of Rio Grande do Norte, Natal 59078-900, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5051-2210","authenticated-orcid":false,"given":"Rafael","family":"Pinto","sequence":"additional","affiliation":[{"name":"Department of Informatics and Applied Mathematics, Federal University of Rio Grande do Norte, Natal 59078-900, Brazil"},{"name":"Laboratory for Technological Innovation in Health (LAIS), Federal University of Rio Grande do Norte, Natal 59010-090, Brazil"},{"name":"Information Systems Coordination, Federal Institute of Rio Grande do Norte, Natal 59015-300, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0876-377X","authenticated-orcid":false,"given":"Juciano","family":"Lacerda","sequence":"additional","affiliation":[{"name":"Laboratory for Technological Innovation in Health (LAIS), Federal University of Rio Grande do Norte, Natal 59010-090, Brazil"},{"name":"Department of Social Communication, Federal University of Rio Grande do Norte, Natal 59072-970, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Lyrene","family":"Silva","sequence":"additional","affiliation":[{"name":"Department of Informatics and Applied Mathematics, Federal University of Rio Grande do Norte, Natal 59078-900, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Thaisa","family":"Santos Lima","sequence":"additional","affiliation":[{"name":"Laboratory for Technological Innovation in Health (LAIS), Federal University of Rio Grande do Norte, Natal 59010-090, Brazil"},{"name":"Federal Senate, Bras\u00edlia 70165-900, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4918-3162","authenticated-orcid":false,"given":"Orivaldo","family":"Santana","sequence":"additional","affiliation":[{"name":"Laboratory for Technological Innovation in Health (LAIS), Federal University of Rio Grande do Norte, Natal 59010-090, Brazil"},{"name":"School of Science and Technology, Federal University of Rio Grande do Norte, Natal 59078-970, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8704-2868","authenticated-orcid":false,"given":"Anna Giselle","family":"Ribeiro","sequence":"additional","affiliation":[{"name":"Laboratory for Technological Innovation in Health (LAIS), Federal University of Rio Grande do Norte, Natal 59010-090, Brazil"},{"name":"School of Science and Technology, Federal University of Rio Grande do Norte, Natal 59078-970, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Agnaldo","family":"Cruz","sequence":"additional","affiliation":[{"name":"Laboratory for Technological Innovation in Health (LAIS), Federal University of Rio Grande do Norte, Natal 59010-090, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5128-6040","authenticated-orcid":false,"given":"Ana Claudia","family":"Ara\u00fajo","sequence":"additional","affiliation":[{"name":"Laboratory for Technological Innovation in Health (LAIS), Federal University of Rio Grande do Norte, Natal 59010-090, Brazil"},{"name":"Department of Social Communication, Federal University of Rio Grande do Norte, Natal 59072-970, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5556-8379","authenticated-orcid":false,"given":"Ang\u00e9lica Espinosa","family":"Miranda","sequence":"additional","affiliation":[{"name":"Ministry of Health, Bras\u00edlia 70070-600, Brazil"},{"name":"Postgraduate Program in Infectious Diseases, Federal University of Esp\u00edrito Santo, Vit\u00f3ria 29075-910, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Aed\u00ea","family":"Cadaxa","sequence":"additional","affiliation":[{"name":"Ministry of Health, Bras\u00edlia 70070-600, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"C\u00e9sar","family":"Teixeira","sequence":"additional","affiliation":[{"name":"Department of Informatics Engineering, Centre for Informatics and Systems of the University of Coimbra (CISUC), 3030-290 Coimbra, Portugal"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7513-081X","authenticated-orcid":false,"given":"Almudena","family":"Mu\u00f1oz","sequence":"additional","affiliation":[{"name":"Department of Communication Theories and Analysis, Complutense University of Madrid, 28040 Madrid, Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9216-8593","authenticated-orcid":false,"given":"Ricardo","family":"Valentim","sequence":"additional","affiliation":[{"name":"Laboratory for Technological Innovation in Health (LAIS), Federal University of Rio Grande do Norte, Natal 59010-090, Brazil"},{"name":"Department of Biomedical Engineering, Federal University of Rio Grande do Norte, Natal 59628-330, Brazil"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2022,12,19]]},"reference":[{"key":"ref_1","unstructured":"da Sa\u00fade, B.M. 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