Antibodies against the novel coronavirus declined rapidly in the British population during the summer, a study found on Tuesday, suggesting protection after infection may not be long lasting and raising the prospect of waning immunity in the community. Scientists at Imperial College London...

President Donald Trump embarked Monday on a final-week charge through nearly a dozen states ahead of the election, overlooking a surge of coronavirus cases in the U.S. and a fresh outbreak in his own White House. His Democratic rival, Joe Biden, is holding far fewer events in an effort to...

Japan and the United States on Monday began air, sea and land exercises around Japan in a show of force in the face of increased Chinese military activity in the region. The Keen Sword exercise is the first big drill since Yoshihide Suga became Japan’s prime minister last month with a vow...

The Turkish currency slid further Monday to an all-time low against the U.S. dollar after President Recep Tayyip Erdogan challenged the United States to slap sanctions over his government’s decision to test its Russian-made air defense system. The lira dropped another 1.3% to 8.06 against...