 Using our age-stratified  model and curated epidemiological and vaccination data, we quantified at which pace European countries can lift restrictions without overwhelming their health-care systems.
<meaning-changed>  Using our age-stratified  model and curated epidemiological and vaccination data, we quantified at which pace European countries can lift restrictions without overwhelming their health-care systems.
 Using our age-stratified model and curated epidemiological and vaccination data, we quantified the rate (relative to vaccination progress) at which countries from the European Union (EU) can lift non-pharmaceutical interventions without overwhelming their health-care systems.