{"id":17608,"date":"2026-07-01T10:00:00","date_gmt":"2026-07-01T13:00:00","guid":{"rendered":"https:\/\/www.biolabeco.com.br\/?p=17608"},"modified":"2026-06-26T13:34:50","modified_gmt":"2026-06-26T16:34:50","slug":"how-sleep-affects-immunity","status":"publish","type":"post","link":"https:\/\/www.biolabeco.com.br\/en\/blog\/prevencao-e-imunidade\/como-o-sono-afeta-a-imunidade\/","title":{"rendered":"How Sleep Affects Immunity: What Science Shows and Why This Information Matters to Health Journalists"},"content":{"rendered":"<p>Observations on how sleep affects immunity have been documented in the scientific literature for decades. A review published in the<em> Pfl\u00fcger's Archive<\/em> \u2013 <em>European Journal of Physiology<\/em>, by Luciana Besedovsky, Tanja Lange, and Jan Born, describes how sleep plays a role in biological processes that are important for immune regulation, including the activity of immune cells, cytokine production, and the response to vaccines.<\/p>\n\n\n\n<p>This data helps broaden the way the issue is addressed in public health. Lack of sleep or poor sleep quality should not be viewed merely as a temporary discomfort: when the problem becomes frequent, it can be linked to significant physiological changes. In Brazil, an analysis published in the Revista de Sa\u00fade P\u00fablica, using data from the National Health Survey, estimated that 35.1% of the Brazilian population aged 15 and older reported sleep problems, such as difficulty falling asleep, frequent awakenings, or sleeping more than usual. The same study found that 8.5% reported using sleep medications in the two weeks prior to the survey.<\/p>\n\n\n\n<p>This content summarizes what the scientific literature reveals about the relationship between sleep and immunity, focusing on biological mechanisms, epidemiological data, and important language considerations for health communicators. The aim is to provide clear and responsible information, without turning general evidence into individualized medical advice.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-o-que-acontece-com-o-sistema-imunologico-quando-dormimos-mal\"><strong>What Happens to the Immune System When We Don't Sleep Well<\/strong><\/h2>\n\n\n\n<p>The immune system works in tandem with the circadian rhythm\u2014that is, with the biological cycles that help regulate sleep, wakefulness, body temperature, hormone secretion, and other bodily functions. According to the review by Besedovsky, Lange, and Born, slow-wave sleep creates a neuroendocrine environment conducive to immune regulation, with changes in hormone release and the distribution of immune cells.<\/p>\n\n\n\n<p>When sleep is repeatedly shortened, fragmented, or insufficient, this balance can be disrupted. Experimental studies described in the literature indicate that sleep deprivation can alter immunological parameters, such as white blood cell count, natural killer cell activity, and the profile of circulating cytokines. These findings do not mean that a single bad night\u2019s sleep alone causes a disease, but they do indicate that a persistent pattern of inadequate sleep can interfere with important defense mechanisms and physiological recovery.<\/p>\n\n\n\n<p>In general, chronic sleep deprivation has been associated with immune dysregulation, in which elevated inflammatory markers may coexist with impaired immune responses. Therefore, sleep should be understood as a relevant variable in a broader assessment of health, alongside factors such as diet, physical activity, vaccination, management of chronic diseases, and professional care.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-citocinas-linfocitos-t-e-memoria-imunologica-os-mecanismos-por-tras-da-relacao-entre-sono-e-imunidade\"><strong>Cytokines, T cells, and immune memory: the mechanisms behind the relationship between sleep and immunity<\/strong><\/h2>\n\n\n\n<p>To understand how sleep affects immunity, it is helpful to consider three key factors: cytokines, T cells, and immune memory.<\/p>\n\n\n\n<p>Cytokines are signaling molecules of the immune system. Interleukin-1, interleukin-6, and tumor necrosis factor-alpha play a role in both the immune response and sleep regulation. According to a review published in the <em>Pfl\u00fcger's Archive<\/em>, sleep deprivation can alter this signaling pattern, leading to a less regulated inflammatory profile in certain contexts.<\/p>\n\n\n\n<p>T lymphocytes also play a role in this process. These cells help coordinate the immune response and, in some subtypes, help destroy infected cells. A study published in the <em>Journal of Experimental Medicine<\/em> It showed that sleep can promote the activation of integrins in T cells, structures involved in the adhesion of these cells to their targets. Sleep deprivation, on the other hand, can impair this mechanism under experimental conditions.<\/p>\n\n\n\n<p>Immune memory is another important point. Just as sleep plays a role in the consolidation of memories in the nervous system, the literature suggests that it may also promote hormonal and cellular conditions related to the organization of long-term immune responses. This process is particularly relevant for understanding why sleep is mentioned in studies on vaccine response.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-sinais-que-ajudam-a-contextualizar-a-pauta-sobre-sono-e-imunidade\"><strong>Points that help put the topic of sleep and immunity into context<\/strong><\/h2>\n\n\n\n<p>Not everyone who sleeps poorly recognizes the problem as insomnia. Some sleep for many hours but wake up feeling tired; others wake up frequently or experience poor-quality sleep. Because these signs are nonspecific and can have many causes, they should not be used on their own to conclude that there is an immune disorder.<\/p>\n\n\n\n<p>Even so, certain symptoms may warrant a more comprehensive assessment of one\u2019s health and sleep habits, such as persistent fatigue, daytime sleepiness, difficulty concentrating, irritability, a feeling of non-restorative sleep, and a decline in daily functioning. When these signs persist or appear alongside other symptoms, the safest course of action is to seek professional evaluation.<\/p>\n\n\n\n<p>It is also important to avoid the misconception that sleeping better\u2014on your own\u2014is guaranteed to \u201cboost immunity.\u201d Sleep plays a role in immune regulation, but the health of the immune system depends on multiple factors, including vaccination, diet, physical activity, disease management, environmental conditions, and medical care when necessary.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"864\" height=\"1821\" src=\"https:\/\/www.biolabeco.com.br\/wp-content\/uploads\/2026\/06\/infografico2-sono-afeta-imunidade.jpg\" alt=\"Infographic on the relationship between sleep and immunity, highlighting data on sleep problems, immune regulation, and the effects of sleep deprivation.\" class=\"wp-image-17611\" style=\"width:548px;height:auto\" srcset=\"https:\/\/www.biolabeco.com.br\/wp-content\/uploads\/2026\/06\/infografico2-sono-afeta-imunidade.jpg 864w, https:\/\/www.biolabeco.com.br\/wp-content\/uploads\/2026\/06\/infografico2-sono-afeta-imunidade-720x1518.jpg 720w, https:\/\/www.biolabeco.com.br\/wp-content\/uploads\/2026\/06\/infografico2-sono-afeta-imunidade-768x1619.jpg 768w, https:\/\/www.biolabeco.com.br\/wp-content\/uploads\/2026\/06\/infografico2-sono-afeta-imunidade-729x1536.jpg 729w\" sizes=\"(max-width: 864px) 100vw, 864px\" \/><figcaption class=\"wp-element-caption\">Source: adapted from Revista de Sa\u00fade P\u00fablica\/SciELO and Revista Brasileira de Psiquiatria\/SciELO.<\/figcaption><\/figure><\/div>\n\n\n<h2 class=\"wp-block-heading\" id=\"h-sono-e-vacinacao-o-descanso-pode-influenciar-a-resposta-imunologica\"><strong>Sleep and Vaccination: Rest May Influence the Immune Response<\/strong><\/h2>\n\n\n\n<p>One of the most extensively studied areas in the relationship between sleep and immunity involves the immune response to vaccines. Scientific reviews describe studies in which sleep restriction in the period around vaccination was associated with a weaker antibody response, including findings related to vaccines against influenza and hepatitis.<\/p>\n\n\n\n<p>This information should be communicated with caution. The evidence does not mean that a vaccine stops working when a person sleeps poorly, nor should it be used to delay vaccination without professional guidance. The safest conclusion is that adequate sleep may be a relevant behavioral factor in an individual\u2019s immune response.<\/p>\n\n\n\n<p>In vaccination campaigns, sleep quality can be addressed as part of a broader communication effort focused on care, prevention, and healthy habits. Nevertheless, the key recommendation remains: follow the vaccination schedule recommended by health authorities and seek professional guidance if you have specific questions.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-como-abordar-sono-e-prevencao-em-conteudos-educativos-de-saude\"><strong>How to Address Sleep and Prevention in Health Education Content<\/strong><\/h2>\n\n\n\n<p>In institutional health content, the topic of sleep can be addressed in an educational manner, provided it is supported by scientific sources and does not promise individual benefits. A safe approach is to explain that sleep plays a role in regulating the body, put scientific findings into context, and advise that persistent symptoms be evaluated by healthcare professionals.<\/p>\n\n\n\n<p>In the case of content channels for a pharmaceutical company, it is recommended that the approach remain informative, without a promotional tone and without suggesting that the brand replaces technical and scientific sources, official guidelines, or clinical evaluation. Content on sleep, immunity, and prevention should prioritize primary references, accessible language, and regulatory validation when institutional sources are cited.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-perguntas-frequentes-sobre-sono-e-imunidade\"><strong>Frequently Asked Questions About Sleep and Immunity<\/strong><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-quantas-horas-de-sono-sao-necessarias-para-manter-a-saude\"><strong>How many hours of sleep are needed to stay healthy?<\/strong><\/h3>\n\n\n\n<p>According to the CDC, adults aged 18 to 60 should get at least seven hours of sleep per night. For adults aged 61 to 64, the recommendation is seven to nine hours; for people aged 65 and older, seven to eight hours. These recommendations are general and may vary depending on age, health conditions, daily routine, sleep quality, and professional advice.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-dormir-mal-uma-noite-ja-prejudica-o-sistema-imunologico\"><strong>Can just one night of poor sleep weaken the immune system?<\/strong><\/h3>\n\n\n\n<p>A single night of total sleep deprivation can alter immune parameters in experimental studies. However, from a public health communication perspective, it is safer to emphasize that the greatest risk lies in a recurring pattern of insufficient or poor-quality sleep. A single bad night\u2019s sleep should not be treated as a direct cause of disease.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-qual-e-a-relacao-entre-dormir-mal-e-ficar-doente-com-mais-frequencia\"><strong>What is the connection between poor sleep and getting sick more often?<\/strong><\/h3>\n\n\n\n<p>Sleep deprivation can affect innate and adaptive immune mechanisms. Studies have also linked insufficient sleep to increased susceptibility to respiratory infections, such as colds, in certain research settings. However, frequent illness can have many causes and should be evaluated by a healthcare professional when it persists.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-o-sono-influencia-a-resposta-as-vacinas\"><strong>Does sleep affect the response to vaccines?<\/strong><\/h3>\n\n\n\n<p>Research on sleep and vaccination indicates that sleep deprivation in the period around immunization may reduce the antibody response compared to adequate sleep patterns. This information should be communicated as a relevant scientific association, not as a reason to delay vaccinations or modify the vaccination schedule without professional guidance.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-onde-encontrar-conteudo-confiavel-sobre-sono-e-imunidade\"><strong>Where can I find reliable information about sleep and immunity?<\/strong><\/h3>\n\n\n\n<p>Reliable sources include scientific reviews published in indexed journals, peer-reviewed studies, and public health institutions such as the CDC and scientific journals in the field of public health. Institutional content can be useful for health education, provided that it clearly cites its sources and does not replace professional guidance.<\/p>\n\n\n\n<p><strong>References consulted<\/strong><br><a href=\"https:\/\/pmc.ncbi.nlm.nih.gov\/articles\/PMC3256323\/https:\/\/www.scielosp.org\/article\/rsp\/2022.v56\/68\/pt\/https:\/\/www.scielo.br\/j\/rsp\/a\/cVZKrdGVd9kyvCxgB67TSjt\/?lang=pthttps:\/\/www.scielo.br\/j\/rbp\/a\/q53sS5JRg98khDqPcssKHdg\/?format=pdf&amp;lang=pthttps:\/\/www.cdc.gov\/pcd\/issues\/2023\/23_0197.htmhttps:\/\/www.cdc.gov\/sleep\/about\/index.htmlhttps:\/\/pmc.ncbi.nlm.nih.gov\/articles\/PMC6400544\/https:\/\/pmc.ncbi.nlm.nih.gov\/articles\/PMC4531403\/https:\/\/pmc.ncbi.nlm.nih.gov\/articles\/PMC3397812\/\">https:\/\/pmc.ncbi.nlm.nih.gov\/articles\/PMC3256323\/<br>https:\/\/www.scielosp.org\/article\/rsp\/2022.v56\/68\/pt\/<br>https:\/\/www.scielo.br\/j\/rsp\/a\/cVZKrdGVd9kyvCxgB67TSjt\/?lang=pt<br>https:\/\/www.scielo.br\/j\/rbp\/a\/q53sS5JRg98khDqPcssKHdg\/?format=pdf&amp;lang=pt<br>https:\/\/www.cdc.gov\/pcd\/issues\/2023\/23_0197.htm<br>https:\/\/www.cdc.gov\/sleep\/about\/index.html<br>https:\/\/pmc.ncbi.nlm.nih.gov\/articles\/PMC6400544\/<br>https:\/\/pmc.ncbi.nlm.nih.gov\/articles\/PMC4531403\/<br>https:\/\/pmc.ncbi.nlm.nih.gov\/articles\/PMC3397812\/<\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>Observa\u00e7\u00f5es de como o sono afeta a imunidade vem sendo realizadas h\u00e1 d\u00e9cadas pela literatura cient\u00edfica. Revis\u00e3o publicada no Pfl\u00fcgers Archiv \u2013 European Journal of Physiology, de Luciana Besedovsky, Tanja Lange e Jan Born, descreve que o sono participa de processos biol\u00f3gicos importantes para a regula\u00e7\u00e3o imunol\u00f3gica, incluindo a atividade de c\u00e9lulas de defesa, a [&hellip;]<\/p>\n","protected":false},"author":8,"featured_media":17610,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1618],"tags":[1703,1689],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v24.4 (Yoast SEO v24.4) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Como o sono afeta a imunidade? 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