Dr Anthony Fauci, who is leading the US response to coronavirus, tells CNN that antibody tests are close to being ready.
An antibody test can be used to see if someone has already had the virus.
“At the last task force meeting, the individuals responsible for developing, validating and getting the test out are saying that within a period of a week or so we are going to have a rather large number of tests that are available,” he said.
“Other countries have gotten burned by this – these antibody tests are tests we do on other diseases, but they need to be validated. You need to make sure they are consistent and accurate.
“As soon as they get validated, they’ll be out there for people to use.”