Covid contagion: incubation time, before symptoms?

Covid contagion: incubation time, before symptoms?

Even in the summer of 2022, Covid-19 remains a highly contagious disease. The initial Sars-CoV-2 virus infected 3 people, the Delta variant more than 6, the Omicron variant nearly 10, and its BA5 subvariant is even more contagious. Period of contagion, before and after symptoms, asymptomatic… Summary Appeared in China in December 2019, the Covid-19 …

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