reporter: terra sinclair, a single mother in l.a., is desperate to get her first grader back into in-person schooling, but not like this. if you had your choice, would you send her to school right now? no. as much as i would love her to be in school, i think just seeing what happened in atlanta once they sent the kids to school, it s not worth it. reporter: tonight, this moment of triumph here in l.a. [ cheers and applause ] beatrice marquez finally leaving the hospital after battling the virus for months. blessed. blessed that i m going home after 80 days. such a fire there, 80 days. matt joins us now from los angeles. matt, we ve talked so much about vaccines, but tonight there s an update on the timeline for some of those experimental antibody drugs being tested now? reporter: what they re talking about is lab-engineered antibodies that would help an immune system fight off the virus. the drugmakers originally hoped they could start production by the end of the summer.