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The Covid-19 pandemic has been perceived mainly as a dangerous acute outbreak of infection that killed more than a million people in the United States and 7 million worldwide. 1,2 However, in the ...

Five years ago, the covid-19 pandemic was getting under way – but we didn’t know it yet. So, what exactly happened? Many scientists are convinced that it began with infected animals at a market in ...

World Health Organization officials first learned about a cluster of cases of pneumonia in the Hubei Province of China on Dec. 31, 2019. This represented the initial report of what soon became known ...