Southern California recipients of a COVID-19 vaccine at a mass vaccination site in Disneyland’s parking lot in January. For strongest immunity, be sure to get both doses of the Pfizer or Moderna vaccine, says the CDC’s new head. She also…

LOS ANGELES — Patients with severe COVID-19 disease who develop respiratory failure have malfunctions in their immune systems that distinguish them from other COVID-19 patients, according to a new study led by Cedars-Sinai. The findings could help doctors develop new…