WASHINGTON (AP) — President Donald Trump on Friday signed an $8.3 billion measure to help tackle the coronavirus outbreak that has killed 12 people in the U.S. and infected more than 200.

The legislation provides federal public health agencies with money for vaccines, tests and potential treatments and helps state and local governments prepare and respond to the threat. The rapid spread of the virus has rocked financial markets, interrupted travel and threatens to affect everyday life in the United States.

Trump had planned to sign the bill during a visit to the Centers for Disease Control and...