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Plasma, Once Out of Favor, Shows Promise Against Covid in Study

  • Hospitalizations decreased 54% for newly infected patients
  • Early dose with high antibody levels needed, authors caution
Storage bags of donor plasma. 
Photographer: Mikhail Tereshchenko\TASS via Getty Images

Newly infected Covid-19 patients saw a 54% decrease in the need for hospitalization after being given plasma from people who had recovered from the virus, according to a study by Johns Hopkins researchers that may offer hope for a new treatment option as variants threaten to reduce the effectiveness of other drugs.

The plasma needed to be given early and contain a high number of antibodies, the study’s authors cautioned. The study was posted to an online preprint service on Tuesday.