On Feb. 25, a day after U.S. President Donald Trump and his wife, Melania, posed for pictures outside the Taj Mahal on an official visit to India, Sumit Kapoor returned to his nearby home from a trip to Italy.
Kapoor, a partner in a shoe manufacturing firm, tested positive a week later for the new coronavirus, becoming the first confirmed case in the northern Indian city of Agra and the origin of the country's first big cluster of the virus.
The city of 1.6 million people, famous for its 17th-century marble-domed Taj Mahal, moved fast. It set up containment zones, screened hundreds of thousands of residents and conducted widespread contact tracing.