Patients need accurate, evidence-based information to understand a diagnosis, learn about treatment options, and make autonomous and informed decisions about their health care. Doctors are still the preferred and trusted source of medical information for most people, but the internet, social media, family and friends, and other sources are commonly used to explore health problems, medication side-effects, diagnoses, and other health-related topics. However, there are growing concerns about the accuracy of information obtained online and the consequences of misinformation on patient outcomes. During the pandemic, the widespread effects of medical misinformation around vaccines and COVID-19 treatments were plain to see. A report published in January 2023 by the Council of Canadian Academies showed that, between March and November 2021, misinformation contributed to vaccine hesitancy for an estimated 2·35 million people in Canada. Misinformation on social media has been amplified by political unrest, distrust in the health-care system, and growing health and racial disparities. More than 70% of adults in the USA report ever using social media, so the potential to rapidly spread inaccurate medical information is high. Social media platforms have, historically, favoured posts with scandalous or radical content to drive engagement and statistics; working with these platforms is an essential step to develop algorithms that reduce the prominence of unreputable sources of information. Part of the solution needs to involve giving trusted sources of information more prominence, but deciphering factually accurate information from reliable sources is a substantial challenge. Another key step is teaching patients how to critically assess medical information on social media and the internet. Methods such as SIFT (stop, investigate the source, find trusted coverage, and trace to the original context) are a good starting point in questioning where content comes from and how reliable and accurate it is. Misinformation can negatively affect the patient–doctor relationship. Although studies have shown that patients would prefer to speak with a physician first, access to health care, associated costs, and long waiting times mean that only 10·9% of patients went to their doctor before seeking information online. However, research suggests that when patients share information found online with their doctor and feel that the doctor is receptive to discussing it, this can have a positive effect on the consultation. Most patients seek information online so that they can be actively involved in health-care decision making; embracing this fact and proactively engaging patients about the use of online sources for medical information might help the doctor and patient to work together and give the physician an opportunity to correct any inaccurate information. One reason patients seek information on the internet is due to a shortage of clear information for treatments provided at the time of prescription. On May 30, 2023, the US FDA proposed a requirement for prescription drugs and some biological products to provide clear, concise, and accessible information delivered in an easy-to-understand one-page format. This information should allow patients to understand important safety information and common side-effects, and empower patients in understanding how to take their medications. The need for reliable information is a global issue. Healthcare Information For All (HIFA) is a global movement, started in 2006, to improve the availability of health-care information in low-income and middle-income countries (LMICs) and to protect people from misinformation. Eight of ten caregivers in LMICs do not know the two key symptoms of childhood pneumonia, and prescriptions for tuberculosis treatment are frequently incorrect. Improved access to information for health-care providers and caregivers is needed. HIFA is launching a HIFA-WHO consultation in August 2023 to identify opportunities and challenges in achieving universal access to reliable health information and to promote public support. The internet and social media as a source of medical information is here to stay. Doctors and nurses need to understand the sources of information that patients are using, teach them how to evaluate the quality of information, and provide them with trusted sources of further information. While ongoing work aims to better regulate harmful social media content and provide high-quality medical information for all, it is reassuring that health professionals are still the most trusted source of information for most people. Health-care staff could have a pivotal role in enabling patients to seek the information they require and, in the process, strengthen the patient–provider relationship. High-quality health systems in the Sustainable Development Goals era: time for a revolutionAlthough health outcomes have improved in low-income and middle-income countries (LMICs) in the past several decades, a new reality is at hand. Changing health needs, growing public expectations, and ambitious new health goals are raising the bar for health systems to produce better health outcomes and greater social value. But staying on current trajectory will not suffice to meet these demands. What is needed are high-quality health systems that optimise health care in each given context by consistently delivering care that improves or maintains health, by being valued and trusted by all people, and by responding to changing population needs. Full-Text PDF Open Access