This guidance is an update of WHO global influenza preparedness plan: the role of WHO and recommendations for national measures before and during pandemics, published March 2005 (WHO/CDS/CSR/GIP/2005.5).

The COVID-19 pandemic has caused unprecedented disruption worldwide highlighting once again the interdependency of health and socioeconomic development, and the global lack of health systems resilience. Two years into the pandemic, most countries report sustained disruptions across service delivery platforms and health areas with a profound impact on health outcomes. The impact of these disruptions is magnified within marginalized communities and in countries experiencing protracted conflict. There is an urgent need to focus on recovery through investment in the essential public health functions (EPHFs) and the foundations of health systems with a focus on primary health care, and whole-of-government and -society engagement. The aim of this Research Topic is to gather, transfer and promote operationalization of key experiences from COVID-19 to inform global and country level recovery that better promote health; guide policy direction towards building health systems resilience; and thereby ensure economic and social prosperity. Experience with COVID-19 has demonstrated that traditional approaches to health system strengthening have failed to achieve the complementary goals of Universal Health Coverage (UHC) and health security with the divide between the most vulnerable and well-off only widening. Much of what had been learned from previous experiences such as Ebola in West Africa has not been widely applied. This has left health and economic systems vulnerable to 21 st century public health challenges, ranging from conflict and natural disasters to aging demographics and rising rates of non-communicable and communicable diseases and antimicrobial resistance. These challenges require intentional focus and investment as well as whole-of-government and -society engagement with health to build health system resilience. Greater action is needed to prevent the devastating effects of war and conflict on the health of the most vulnerable. This Research Topic will convene the knowledge and practices of leaders in public health, health systems, and humanitarian and development sectors. This is to ensure lessons from COVID-19 inform the recovery agenda and promote sustainable health and socioeconomic recovery for all. Lest we forget and find ourselves again unprepared and vulnerable in the face of an even greater threat.

The emergence of severe acute respiratory syndrome (SARS) in late 2002 and 2003 challenged the global public health community to confront a novel epidemic that spread rapidly from its origins in southern China until it had reached more than 25 other countries within a matter of months. In addition to the number of patients infected with the SARS virus, the disease had profound economic and political repercussions in many of the affected regions. Recent reports of isolated new SARS cases and a fear that the disease could reemerge and spread have put public health officials on high alert for any indications of possible new outbreaks. This report examines the response to SARS by public health systems in individual countries, the biology of the SARS coronavirus and related coronaviruses in animals, the economic and political fallout of the SARS epidemic, quarantine law and other public health measures that apply to combating infectious diseases, and the role of international organizations and scientific cooperation in halting the spread of SARS. The report provides an illuminating survey of findings from the epidemic, along with an assessment of what might be needed in order to contain any future outbreaks of SARS or other emerging infections.

Integrating Social Care into the Delivery of Health Care: Moving Upstream to Improve the Nation's Health was released in September 2019, before the World Health Organization declared COVID-19 a global pandemic in March 2020. Improving social conditions remains critical to improving health outcomes, and integrating social care into health care delivery is more relevant than ever in the context of the pandemic and increased strains placed on the U.S. health care system. The report and its related products ultimately aim to help improve health and health equity, during COVID-19 and beyond. The consistent and compelling evidence on how social determinants shape health has led to a growing recognition throughout the health care sector that improving health and health equity is likely to depend â€" at least in part â€" on mitigating adverse social determinants. This recognition has been bolstered by a shift in the health care sector towards value-based payment, which incentivizes improved health outcomes for persons and populations rather than service delivery alone. The combined result of these changes has been a growing emphasis on health care systems addressing patients' social risk factors and social needs with the aim of improving health outcomes. This may involve health care systems linking individual patients with government and community social services, but important questions need to be answered about when and how health care systems should integrate social care into their practices and what kinds of infrastructure are required to facilitate such activities. Integrating Social Care into the Delivery of Health Care: Moving Upstream to Improve the Nation's Health examines the potential for integrating services addressing social needs and the social determinants of health into the delivery of health care to achieve better health outcomes. This report assesses approaches to social care integration currently being taken by health care providers and systems, and new or emerging approaches and opportunities; current roles in such integration by different disciplines and organizations, and new or emerging roles and types of providers; and current and emerging efforts to design health care systems to improve the nation's health and reduce health inequities.