Wearing a mask can no longer protect against the virus
The new coronavirus has turned to "more powerful sol particles."Tell everyone about science,What are aerosol particles?
Aerosol refers toParticulate matter suspended in the air, The particle diameter is generally less than 0.1mm, and the familiar PM2.5 is an aerosol.If it is the aerosol exhaled by the infected person, it is a high-humidity bioaerosol particle, which is most likely to contain a variety of pathogens such as viruses.
In a study conducted by the University of Maryland, it was found that because Delta is spread through the air, wearing a maskOnly effectively reduced by about 50%The number of new coronavirus-infected people breathed into the air.This means that enhancing the protection rate after vaccination is the most effective epidemic prevention method that can be done at present, because the protection of ordinary masks worn by the people is still insufficient.
FDA: Approves children to use Pfizer vaccine
German BioNTech and American pharmaceutical giant Pfizer stated in a joint statement on September 9: "The vaccine is safe among vaccinators between 5 and 11 years of age, It is well tolerated and shows a strong neutralizing antibody response. "More than 2200 children participated in the experiment, and the two companies promised to submit experimental data to regulatory agencies in the European Union, the United States and other parts of the world as soon as possible.
U.S. Food and Drug Administration (FDA)The BioNTech-Pfizer vaccine has been approved for use in children as young as 12 years old, Other vaccine manufacturers, such as Modena and Johnson & Johnson, are also testing their vaccines on young children.Israel has vaccinated children between the ages of 5 and 11, and Cuba has also vaccinated two-year-old children in order to reopen schools.
However, as far as the experimental data is concerned, although the dose of vaccine injected by children between 5 and 11 years old will be less than that of people over 12 years old, it will also appear after children are vaccinated.Temporary side effects, Such as arm pain, fever or pain.
Many Chinese parents, not even those with academic or biology majors, have made it very clear that once the vaccine is available, they will take their children to get vaccinated immediately.
It is hoped that after a large-scale vaccination, the school's epidemic situation will be greatly alleviated!
ref: https://www.ctvnews.ca/health/coronavirus/coronavirus-variants-better-at-travelling-through-the-air-raising-transmission-risk-study-finds-1.5589942
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