Science

vaccines for all not before 2022

[ad_1] Ansa The warning comes from the World Health Organization that it adds a 90-pound load at night to the abrupt stop of the AstraZeneca brand vaccine. “It will take a long time to achieve herd immunity,” she explained. Bbc Dr. Soumya Swaminathan, one of the principal investigators of the …

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Back to school: what masks and visors really protect?

[ad_1] Masks examined by researchers at Duke University in Durham (photo by Emma Fischer, Duke University) The same occurs with valve masks, which are even less effective in stopping the emitted drops and with all homemade masks that, unless they are very close to the face and are made of …

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