World Health Day international, regional and local events on the Day related to a particular theme. World Health Day is acknowledged by various governments and non-governmental organizations with interests in public health issues, who also organize activities and highlight their support in media reports, such as the Global Health Council. World Health Day is one of eight official global health campaigns marked by WHO, along with World Tuberculosis Day, World Immunisation Week, World Malaria Day, World No Tobacco Day, World AIDS Day, World Blood Donor Day, and World Hepatitis Day. In 2006, World Health Day was devoted to the health workforce crisis, or
Global health 2006 World Health Report, the WHO estimated a shortage of almost 4.3 million doctors, midwives, nurses, and support workers worldwide, especially in sub-Saharan Africa. The Global Health Security Agenda (GHSA) is "a multilateral, multi-sector effort that includes 60 participating countries and numerous private and public international organizations focused on building up worldwide health security capabilities toward meeting such threats" as the spread of infectious disease. On March 26-28, 2018, the GHSA held its last high-level meeting which was located in Tbilisi, Georgia on biosurveillance of infectious disease threats, "which include such modern-day examples as HIV/AIDS, severe acute respiratory syndrome (SARS),