Passive immunotherapy flu trials sort A from B

Two new trials test a treatment strategy used in the 1918 pandemic

Results of two trials of immunotherapy for patients with severe influenza have surprised researchers by drawing a blank for influenza A, while providing some hope for treatment of influenza B.

1918 influenza pandemic
Emergency hospital in Kansas, US, during the 1918 influenza epidemic.

The double-blinded trials, published simultaneously in the Lancet