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Asked if the disease can actually be eliminated, Gates said, "We don't know enough yet.

Astronauts Christina Koch and Jessica Meir finished their spacewalk at 1:33 pm US Eastern Time (0633 GMT), which lasted about six hours and 58 minutes, according to the US space agency NASA.

At least in Seattle, Amazon has the benefit of its own trucking fleet which is already delivering groceries to customers’ homes via the Amazon Fresh service.

Aside from the reduction in the number of spectators, the changes could include a shortened format for the opening and closing ceremonies of the Olympics and Paralympics, Kyodo News reported.

Asia's largest refiner Sinopec announced its preliminary listing plan for its marketing arm on Thursday, a move to further open up the country's energy markets.