给我提供最新的关于COVID-19的报道。
COVID-19 cases continue to rise globally, with over 180 million confirmed cases and 3.9 million deaths reported as of June 2021. The Delta variant, which is more transmissible and potentially more severe, has become dominant in many countries and has led to increased concern and renewed efforts to vaccinate populations. Many countries are also easing restrictions and reopening their economies, although concerns remain about the potential for new waves of infections. Vaccine rollout continues to be a challenge, with access and distribution inequalities persisting.