R. R. R. The “five” holidays that have just taken place have tended to thrive across the country. Despite intensive personnel, there are not many people wearing masks because of the warming of weather. Many fear that such proximity, coupled with the emergence of new toxic strains, will not be repeated? On this issue, the daily reporters of science and technology interviewed relevant experts. Photo sources: visual China Low risk of secondary infection still effective “In terms of monitoring da...