Lessons from COVID-19to reshape a sustainable response to HIV, TBand HCV among inadequately served populationsin the countries of Eastern Europe and Central Asia

As a result of the COVID-19 pandemic, health systems around the world have to become more robust, flexible, and results-oriented.Changes have been made in the approach that some health systems have taken to the delivery of a range of services, including interventions for the management of HIV and opioid dependence as well as the treatment of tuberculosis (TB) and viral hepatitis C (HCV) among key population groups. Many of these changes have been welcomed by communities, with a window of opportunity to revisit and refresh issues of drug use regulations, policing, amnesty for people in prisons and other closed settings.