SYDNEY/LONDON (Reuters) - Nations in Asia imposed new restrictions on Monday, while an abrupt British quarantine on travellers from Spain threw Europe's summer reopening into disarray, as the world confronted the prospect of a second wave of COVID-19 infections.
In the United States, still dealing with its first wave as infection rates have climbed since June, President Donald Trump's national security adviser, Robert O'Brien, became the most senior official to test positive. The White House said Trump had not interacted with him in days and was not at risk.