WASHINGTON : Convalescent plasma therapy appears to be a safe and possibly effective treatment for children with life-threatening cases of COVID-19, according to a small study.The research, published in the journal Pediatric Blood and Cancer, is the first report of convalescent plasma in children with life-threatening COVID-19.Researchers from Children's Hospital of Philadelphia (CHOP) in the US noted that no therapies have been yet proven safe and effective for children who develop life-threatening complications from contracting the SARS-COV-2 virus.One possible treatment that has been explored in adults is the use of convalescent plasma, which is derived from patients who have recovered from COVID-19, they said.The therapy can be.