Coronavirus updates: 84% of California population to go on lockdown Sunday night

Moderna announced in a filing with the federal government that it will begin recruiting volunteers between 12 and 18 years old to participate in its coronavirus vaccine trials.

This listing doesn't say when Moderna will start its trials in children.

It's common in clinical trials to start with adults and then when the safety profile has been established to add more populations like children and pregnant women.

Pfizer has already started recruiting, enrolling and testing its vaccine on children as young as 12 years old.

-ABC News' Eric Strauss

The White House and U.S. Department of Health and Human Services announced they've purchased over 650,000 courses of of Eli Lilly's monoclonal antibody treatment for high-risk patients.

The treatment, bamlanivimab, can reduce the risk of severe coronavirus symptoms before someone becomes hospitalized.

The treatment will be deployed in December and January and complement the 300,000 doses that are currently being distributed, according to HHS.

Eli Lilly received emergency use authorization for bamlanivimab from the Food and Drug Administration last month.

-ABC News' Stephanie Ebbs

Texas Gov. Greg Abbott said the CDC is allocating over 1.4 million vaccine doses for the state for December.

The doses are expected to arrive the week of Dec. 14, he said Wednesday.

"Additional allotments may be made later this month for December," Abbott said, and "increased allotments are expected in January and the following months."

Meanwhile, California Gov. Gavin Newsom said his state will receive 327,000 doses of the Pfizer vaccine in mid-December.

New York Gov. Andrew Cuomo said Wednesday he expects the state to receive 170,000 doses of Pfizer's vaccine on Dec. 15 if all safety and efficacy approvals are granted. Cuomo said he expects additional doses of Pfizer's vaccine as well as initial allocations of Moderna's vaccine, if approved, later this month.

Former President Barack Obama said he will "absolutely" get the vaccine if Dr. Anthony Fauci says it's safe to take, and Obama said he may even have cameras present for the moment to demonstrate to the public that he trusts the science. 

"People like Anthony Fauci, who I know, and I've worked with, I trust completely. So if Anthony Fauci tells me this vaccine is safe, and can vaccinate, you know, immunize you from getting COVID, absolutely, I'm going to take it," Obama told SiriusXM host Joe Madison.

"I may end up taking it on TV or having it filmed, just so that people know that I trust this science, and what I don't trust is getting COVID," he continued. "I think at this point, particularly in the African American community, we are -- African Americans, Hispanics, Native Americans -- we have the highest death rates from this thing, and are most exposed and most vulnerable, in part because we have a lot of preexisting conditions."

-ABC News' Ben Gittleson