The International Health Regulations (IHR) pursuant to Article 21 of the Constitution of WHO came into force in June 2007 and allow the General-Director of WHO to declare an international health emergency.
In such a case, the Director-General can impose regulations, including “sanitary and quarantine requirements and other procedures designed to prevent the international spread of disease”, also travel restrictions.
In the event of WHO declaring a pandemie, WHO has the authority to order forced vaccinations around the world.
All 194 signatory countries to IHR must comply. A list of countries which have signed the WHO Constitution can be found under this link.
This is Article 21 of WHO’s Constitution.
“Article 21The Health Assembly shall have authority to adopt regulations concern-ing:(a) sanitary and quarantine requirements and other procedures designed toprevent the international spread of disease;(b) nomenclatures with respect to diseases, causes of death and publichealth practices;(c) standards with respect to diagnostic procedures for international use;(d) standards with respect to the safety, purity and potency of biological,pharmaceutical and similar products moving in international com-merce;(e) advertising and labelling of biological, pharmaceutical and similarproducts moving in international commerce.
Article 22Regulations adopted pursuant to Article 21 shall come into force for allMembers after due notice has been given of their adoption by the HealthAssembly except for such Members as may notify the Director-General ofrejection or reservations within the period stated in the notice.
The International Health Regulations 2005 are legally binding regulations (forming international law) that aim to a) assist countries to work together to save lives and livelihoods endangered by the spread of diseases and other health risks, and b) avoid unnecessary interference with international trade and travel.”