After months of downplaying the threat of the Covid-19 pandemic, President Trump announced early Friday morning that he and First Lady Melania Trump had tested positive for the coronavirus. He is now hospitalized at the Walter Reed National Military Medical Center, with what people close to him said on Friday were mild symptoms, including a fever, cough and congestion.
It’s too soon to tell whether his illness will follow a typical course, or how severe his symptoms may become. And with millions of people sickened worldwide, no single timeline can encompass the range of Covid cases. But months of data have helped scientists home in on the general portrait of a symptomatic coronavirus case.
Exposure and incubation
The time between initial exposure to the virus and the appearance of symptoms is known as the incubation period. This period is typically four to five days, although it can last up