What we know and don't know about the coronavirus | COVID-19 Special

Just over a year ago, the Coronavirus made the world shut down and brought death and despair.
Now there are vaccines - and many countries where people have been inoculated. More than half the population in the worst-hit country, the US. In Britain, it's even two-thirds.
After more than a year of COVID-19, we've become familiar with complex medical terminology and difficult virological concepts. But we also realize it's not going away that easily.
Britain and the US are having trouble convincing more people to get vaccinated; the new Delta variant is spreading rapidly. Vast regions, like Africa, still lack vaccines. In Australia, where several cities are re-introducing restrictions to try to contain new COVID-19 clusters, some linked to the Delta variant. Sydney and Darwin have begun new lockdowns, while other cities are re-introducing mask wearing. Only 5 percent of the population in Australia has been fully vaccinated.
So is it really time to celebrate?


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