A growing number of White House staff and senior Republicans have tested positive for COVID-19 since President Donald Trump revealed he had contracted the respiratory disease.

The infections have roiled the presidential campaign, now in its final month, rattled financial markets and slowed the work of Congress, with the Senate vowing to delay any votes now that three members of the Republican majority have tested positive.

Several people who met with the president last week said they had since tested negative, but it can take days for someone who has been exposed to the virus to develop symptoms or to test positive. Below is a list of people close to Trump who have tested positive and negative for coronavirus in recent days: