White House 'Assured' J&J Will Meet Vaccine Shipment Targets

The transcript discusses the availability and delivery commitments of COVID-19 vaccine doses by Johnson & Johnson, with expectations to deliver 24 million doses in April and 100 million by the end of May. It also mentions the US government's purchase of these doses and additional supplies from Pfizer and Moderna, with assurances that deadlines will be met.

What is the significance of the doses mentioned in the text in relation to the US government?

What assurance has been given regarding the deadlines for vaccine doses?