The following is a summary of some recent studies on COVID-19. They include research that warrants further study to corroborate the findings and that has yet to be certified by peer review.
When used in children, rapid antigen tests for detecting the coronavirus do not meet accuracy criteria set by the World Health Organization and U.S. and UK device regulators, according to researchers who reviewed 17 studies of the tests.The trials evaluated six brands of tests in more than 6,300 children and teenagers through May 2021. In all but one study, the tests were administered by trained workers.
Given that more than 500 antigen tests are available in Europe alone, the authors said, "the performance of most antigen tests under real-life conditions remains unknown." But the new findings "cast doubt on the effectiveness" of rapid antigen tests for widespread testing in schools, they concluded.A new study appears to confirm smaller, earlier studies that suggested nursing mothers are unlikely to transmit the coronavirus in breastmilk.
Between March and September 2020, researchers obtained multiple breastmilk samples from 110 lactating women, including 65 with positive COVID-19 tests, 36 with symptoms who had not been tested, and a control group of 9 women with negative COVID-19 tests.
In experiments using the new approach to look for antibodies to HIV, "we flipped the process on its head... by starting with structure," Ward said. Because cryoEM affords such high resolution, instead of having to laboriously sort through antibody-producing immune cells one by one to identify promising antibodies, the process of identifying antibodies, mapping their structure and seeing how they are likely to attack viruses and other targets goes much faster, he added.
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