The United States still had the highest number of infections, about 2 million or 25 percent of all reported cases. However, the outbreak is growing fastest in Latin America, which now accounts for 21 percent of all cases, according to a Reuters tally.
Brazil's Covid-19 cases and deaths had surged to make it second hot spot in the world.
The first case was reported in China in early January and it took until early May to reach 4 million cases. It has taken just five weeks to double to 8 million cases, according to a Reuters tally.