Biden administration boosting weekly supply of COVID-19 vaccine doses to states

Vaccine supply to states, territories and Native American tribes will climb to 10 million doses next week, up from 8.6 million and continue at that rate for the next three weeks.

President Biden is expected to announce the changes in the country's vaccine distribution plan at a White House event later Tuesday.

The federal government is planning to purchase 200 million doses of COVID-19 vaccines — 100 million doses of the Pfizer vaccine and 100 million doses of the Moderna vaccine, participants said.

Next week, the administration is sending out 5.7 million doses of the Moderna vaccine and 4.3 million doses of the Pfizer vaccine.

This purchase raises the federal government's total vaccine order from 400 million current doses to 600 million doses, which would allow the federal government to vaccinate 300 million Americans, a senior Biden administration official told CBS News on Tuesday.

The newly-purchased doses — which will be produced "over the course of the summer" — does not, as of now, move up the timeline for all Americans to receive a vaccine if they want one.

"But with the announcement today, we have now purchased enough vaccine to vaccinate 300 million Americans, that's good news." .

Perna, who is overseeing Operation Warp Speed, the national vaccine distribution program launched by the Trump administration.

Biden administration officials also told governors that the federal government plans to continue with per-capita distribution of the vaccine instead of accelerating distribution to states with faster, more efficient plans — an idea that had been floated in the closing weeks of the Trump administration