How close are we to a vaccine for COVID-19?

How close are we to a vaccine for COVID-19, and what might a vaccine rollout look like in various countries? The task of distributing it to populations around the world could be daunting. Also, in Sofia, Bulgaria demonstrations have been taking place every night for nearly two months now. Protesters want their prime minister and his government to resign. And, it's been a summer of wildfires across the Arctic, of all places. 

How close are we to a vaccine for COVID-19, and what might a vaccine rollout look like in various countries? The task of distributing it to populations around the world could be daunting. Also, in Sofia, Bulgaria demonstrations have been taking place every night for nearly two months now. Protesters want their prime minister and his government to resign. And, it's been a summer of wildfires across the Arctic, of all places.