fda about at-home antigen tests, it's a little confusing, the fda saying those tests are not as sensitive to detecting omicron, but the white house team stressed the at-home tests still offer, quote, an important use. jeremy diamond joins me. jeremy, i know you just spoke to the covid-19 response director. what did he tell you? >> reporter: that's right, i asked at the coronavirus briefing specifically about the 500 million happen at-home tests that the white house is set to ship to americans beginning next month. and the news that he gave me is that they're still in the process of finalizing the contract to obtain those. but he says he does expect that contract to be completed late next week. of course, that would be the end of the first week of january. meaning that americans likely won't begin to see see the at-home covid tests until end of january. he said the details are forthcoming still in terms