The mask was invented by Lian Dewu. 19 10 was the first large-scale plague in China history that was effectively controlled by combining the practice of scientific epidemic prevention experts with government actions. He personally performed the first pathological anatomy in the medical history of China and became the first person in the world to put forward the concept of pneumonic plague. He designed Wu's mask, which made China people use it to prevent infectious diseases for the first time, and advocated the system of separate meals.

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Wu Liande, male, was born in Penang, and his ancestral home is Xinning County, Guangzhou City, Guangdong Province. Doctor of Medicine, Cambridge University, founder of health, epidemic prevention and quarantine in China, pioneer of modern medicine, microbiology, epidemiology, medical education and medical history in China, first president of Chinese Medical Association, main organizer of Peking Union Medical College and Peking Union Medical College Hospital, candidate for 1935 Nobel Prize in Physiology or Medicine, candidate for the first Nobel Prize in Chinese World.

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Mask is a kind of sanitary product, which is usually worn on the nose and mouth to filter the air entering the nose and mouth to block harmful gases, smells, droplets, viruses and other substances. It is made of gauze or paper.