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Let the United Kingdom, the United States and other European and American countries be infected as a whole, let's look at the experimental results and then say. Is it that the new crown has evolved into the flu, and the flu has not been vaccinated before the new crown epidemic? So it should be

author:Hengshan Luoran pen and ink

Let the United Kingdom, the United States and other European and American countries be infected as a whole, let's look at the experimental results and then say. Is it that the new crown has evolved into the flu, and the flu has not been vaccinated before the new crown epidemic? Therefore, we should also adhere to the current epidemic prevention policy.

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