Worst nightmare! Woman catches Covid’s Delta and Omicron variants within record 20 days - Based on this case, researchers have confirmed that one can get infected with Covid-19 more than once despite getting fully vaccinated.
Scientists and health officials around the world are keeping their eyes on a descendant of the omicron variant that has been found in more than 50 countries, including the United States.
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DNA Explainer: What is Twindemic and why experts warn against it - Late 2021 the flu virus started circulating in Europe at a higher-than-expected rate, which was believed to have temporarily eradicated due to Covid.