WASHINGTON — DuPont, the giant biotech company, is expediting production and delivery of a product critical to protecting U.S. doctors and nurses during the coronavirus pandemic: Tyvek hazmat suits, which offer medical personnel the best protection from contracting the virus themselves.Since the pandemic first made its way to the U.S. from China, personal protective gear for practitioners treating the virus, like surgical masks and gloves, has been in dangerously short supply. Physicians interviewed by NBC News say Tyvek suits are their most pressing need — the most effective safeguard, in combination with hats, gloves and masks, available against a virus most likely spreading through stagnant hospital air.In contrast to standard hospital smocks, Tyvek jumpsuits are made of polyethylene fibers to provide full body coverage and repel aerosols and fluids. The suits have been widely used by medical personnel in China, where they are more easily accessible to health care workers because, unlike in the U.S., they are registered medical devices.”It’s basically a full bunny suit. You’re covered head to toe. It’s appropriate, and other parts of the world have done that,” said Dr. Kamal Kalsi, an emergency room doctor and Army officer practicing in hospitals in New York and New

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