Five countries account for more than half of the world's Covid-19 cases, which now stand at just over seven million, according to the map and dashboard from Johns Hopkins University.

The United States has the highest number of confirmed cases so far - with more than 1.9 million.

With nearly 700,000 cases, Brazil comes second, followed by Russia (467,073), the UK (287,621) and India (257,486).

But testing rates vary widely across these countries - testing availability in the US has improved in recent weeks, but experts say Brazil and India, which have been testing too little, are likely to have far more infections than reported.

Of course, difference in population sizes are important to consider. The US has about 330 million people, while India has more than 1.3 billion. To account for this, researchers also use another metric - confirmed cases per 100,000 people.

By this measure, Peru - with 585 cases - tops the list, followed by the US (579), UK (428), Italy (388) and Russia (311).