apparently quality control issues were found in a baltimore plant run by emergent biosolutions, that actually helps make the jaohnson & johnsn vaccine. but we now know that that plant has not received fda authorization yet. the human error discovered during the validation process, they say, and the company tonight assuring people at home that this does not effect any of the current vaccine out there or their promised timeline? >> reporter: that's exactly right, david. johnson & johnson says vaccines that were finished and distributed were never in jeopardy. here's what they're telling us tonight. they say they've met their delivery targets and are still confident they will deliver 100 million doses in the first half of the year as expected. and as you mentioned, david, this plant was not yet authorized by the fda. they say this quality control issue is part of the checks and balances that keep the manufacturing safe once it starts. david? >> that's why the checks and balances are in place. stephanie tonight, thank you. late today, president biden on his sweeping $2 trillion infrastructure plan. president biden coming before the cameras just a short time