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The correct way to wear several common masks

There are many types of masks on the market, and different types of dust masks have different wearing methods. Mastering the correct wearing method of masks can more effectively prevent dust and other fine particles from harming the human respiratory tract.

Why do residents who are negative have to be tested repeatedly？

Why are residents who tested negative for nucleic acid required to undergo repeated nucleic acid testing? There are three reasons.

Method of choosing FFP2 protective masks

First: the efficiency of the mask to high dust. The dust resistance efficiency of a respirator is based on its resistance to fine dust, especially respirable dust less than 5 μm...

The detection principle of COVID-19 rapid test agent

This product adopts double antibody sandwich immunochromatography technology. If the sample contains the novel coronavirus, the test line is colored, indicating a positive result. If the sample does not contain the novel coronavirus, the test line does not show color, indicating a negative result.

What is the suitable population for oximeter?

People with vascular diseases (coronary heart disease, hypertension, hyperlipidemia, cerebral thrombosis...)

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