One of the tragedies of the coronavirus crisis is the lack of protection for healthcare workers: With a shortage of N95 masks—the respirators that can help filter out virus-filled droplets from coughs or sneezes—doctors and nurses in the U.S. are begging the government to do more to increase production. In Italy and China, thousands of doctors were infected with COVID-19 in part because they didn’t have masks, gloves, or other protection. Many have died.

The U.S. government’s national stockpile includes 12 million N95 masks and 30 million of the less-effective simple surgical masks. But during a pandemic, the Department of Health and Human Services estimates that as many as 3.5 billion could be needed in a single year. Already, hospitals and clinics are rationing masks. Some healthcare workers, in desperation, are using DIY masks, or none at all. “It’s like going to war with a butter knife,” one doctor told The Atlantic. It raises a question: Why aren’t N95 masks designed to be safely reused? And if you want to buy Medical Mouth Masks, visit z2u.com, a professional online in-game currency store.

The mask shortage problem has happened before, including in the SARS epidemic, when some areas ran low on respirators. Following that, the National Academy of Sciences said that the Centers for Disease Control and Prevention should study whether the masks could be decontaminated and reused. “The problems that we’re facing today are not new, in that there was at least a small group of people that had recognized this was going to be a problem and we should be better prepared for it in the future,” says Ron Shaffer, a scientist who previously worked at the CDC and led a team researching the potential for reusing personal protective equipment.

The challenge, of course, is that if a mask is exposed to a virus like SARS-CoV-2, reusing it could potentially spread the virus. In a series of studies, Shaffer’s team identified some promising methods for eliminating viruses on N95 masks, including generating steam heat along with the mask in a microwave, and treating the mask with ultraviolet light. (Other methods, including using bleach, killed the virus but left an unpleasant smell and could also potentially damage the mask.) “The trick is you have to create a decontamination method that’s rigorous enough to kill the virus but gentle enough not to destroy the respirator,” he says. One problem is the fact that all masks are not alike; the researchers found that some were sturdier than others, and some broke down more easily. Some more recent studies by other researchers confirmed that when masks were disinfected with UV light multiple times, it affected the longevity of some models.

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