The US dollar edged higher against most of its rivals, amid improved risk appetite, while investors avoided safe havens.
The World Health Organization stated that coronavirus infections have increased in the US, Europe and Asia due to the new Delta strain, which has renewed fears of the pandemic spreading out of control.
Bear in mind that the mutated Delta strain was detected in Europe, the UK and several other countries around the world, after it first emerged in India.
The 10-year US Treasury bond yields held at 1.195%, while the 30-year Treasury yields rose to 1.857%.
The dollar index rose against a basket of major currencies by 0.1% to 92.9 points as of 20:13 GMT, after hitting a high of 93.04 points and a low of 92.6 points.