# Public health and diagnostic challenges in Brazil > Live situation record from CLSTR: https://clstr.news/situations/public-health-and-diagnostic-challenges-in-brazil > Updated: 2026-08-31T22:00:00.000Z. Sources: 2. Developments: 2. Health challenges in Brazil have been highlighted through studies on cancer diagnosis and rare disease management. Research from a hospital in Paraíba indicated that the COVID-19 pandemic caused a sharp decline in breast cancer diagnoses during 2020–2021, leading to patients being identified at more advanced clinical stages. Further analysis of breast cancer in the country suggests that approximately 90% of cases are linked to lifestyle habits rather than heredity, with genetic factors accounting for only 5% to 10% of diagnoses. Experts emphasize that preventive measures such as physical activity and nutrition could reduce incidence by 35%. Additionally, a national epidemiological study revealed significant delays in diagnosing rare diseases. The research found that over 17% of surveyed patients lacked a definitive diagnosis, with many waiting more than five years from symptom onset. These delays are attributed to a lack of specialized resources and genetic testing. ## Timeline ### 2026-08-31: Health challenges in Brazil: Lifestyle impacts breast cancer and rare disease diagnosis lags Health reports in Brazil highlight that 90% of breast cancer cases are linked to lifestyle habits, while a new study reveals significant delays and diagnostic gaps for patients with rare diseases. 2 sources. https://clstr.news/cluster/health-challenges-in-brazil-lifestyle-impacts-breast-cancer-and-rare-disease-diagnosis-lags ### 2026-08-06: Brazil's COVID-19 pandemic worsens breast cancer diagnosis and fuels massive emergency aid COVID-19 in Brazil delayed breast cancer diagnoses in Paraíba and prompted a R$294 billion emergency aid program that reached 68 million people, affecting health outcomes and the economy. 2 sources. https://clstr.news/cluster/brazils-covid-19-pandemic-worsens-breast-cancer-diagnosis-and-fuels-massive-emergency-aid --- Cite as: Public health and diagnostic challenges in Brazil. CLSTR, https://clstr.news/situations/public-health-and-diagnostic-challenges-in-brazil