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The halt was implemented on August 24 after Novartis was notified of three cases of a severe, life-threatening immune reaction. Complications from the reaction, in which the body's defense system overreacts and attacks its own organs, led to the deaths, the Swiss drugmaker said.

Thanks to a laser-equipped mini-microscope developed by a French start-up, scientists have discovered a previously undetected feature of the human anatomy that could help explain why some cancers spread so quickly. (Shutterstock/Giovanni Cancemi)

Novartis said on Tuesday itpaused eight clinical trials of an experimental cell therapy, called rap-cel, targeting autoimmune and neurological disorders in late August, after three patients died. The halt was implemented on August 24 after Novartis was notified of three cases of a severe, life-threatening immune reaction. Complications from the reaction, in which the body's defense system overreacts and attacks its own organs, led to the deaths, the Swiss drugmaker said.