A member of the National Health and Safety Commission's high-level expert group and a well-known infectious disease expert in China, said in an interview with a reporter from China News that medical staff need to wear goggles for protection because of direct contact with fever patients.
According to research, the new coronavirus is prone to bind to the human angiotensin-converting enzyme 2 (ACE2) receptor, which is mainly present in lower respiratory tract cells, causing the virus to invade lung cells.
In addition to the cornea, the anterior surface of the eyeball is covered with a layer of mucosal tissue, which we call conjunctiva. When the eyes are opened, they are exposed to the air and are easily infected by external bacteria and viruses. Moreover, these mucosa and nasal mucosa (part of the respiratory tract) are continuous and closely related, and related diseases are likely to affect each other.
These conjunctival cells actively or passively engulf particles attached to their surface, engulfing hundreds of nanometer-sized particles most. In 2003, the SARS coronavirus was about 100 nanometers in diameter, which is the size that is most easily engulfed by the mucosal cells on the surface of the eye; and the first-line anti-SARS medical staff are equipped with goggles to really control their infection.
Of course, whether small particles are easily engulfed by cells is not only related to particle size. It is also related to many factors such as particle shape, surface structure, and chemical properties. However, many studies have shown that the size effect of particles is significant in the interaction between nanoparticles and cells.
Therefore, if you need to be in close contact with patients diagnosed and suspected by the new coronavirus, and you have a high concentration of coronavirus aerosols in your environment, then wearing protective goggles in addition to protective clothing, masks, and gloves is of course reliable Wise choice.
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