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They will be invited to take an experimental therapy or a placebo as part of a rigorously designed randomized clinical trial. The trial, which is known as ACTIV-2, also may investigate other experimental therapeutics later under the same trial protocol.

They have summarized the country's achievements in reform, rule of law, diplomacy and anti-corruption, as well as economic and social development over the past five years. The documentary teams have produced edited clips, just a few minutes long, perfect to connect with people on social media. All this shows how State media are effectively adapting to the modern era.

They frequently attack district offices, military camps, installations and security checkpoints, while the Afghan military respond with airstrikes on militant targets in the countryside.

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They also should properly manage and control their differences and sensitive issues to ensure that bilateral relations yield more positive outcomes, Yang said.

They dispatch bikes and handle parking black spots by using cloud computing and artificial intelligence, or AI, technology.

They discussed the denuclearization of the Korean Peninsula and bilateral issues without signing a deal, while both sides expressed willingness to continue the peace process on the Peninsula.

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Third, China and Europe should work together to promote development and prosperity in the world.

They are a useful tool to express attitude and emotions, or to say what cannot be said directly.

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Third, political trust between the two countries is important. This requires both sides to continue mutual dialogue and communication in order to avoid anything that may be detrimental to mutual trust. Our political trust has withstood the test of time. Yet we cannot rest on past laurels because we both face different challenges, including internal and external ones.

They noted that "ensuring a path back to sustainable fiscal balances" will also be key in countries that entered this crisis with already elevated debt and low growth.