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Understanding this incubation period—the time between when a virus enters a person’s body and when they start feeling sick—is crucial for health officials. COVID-19 symptoms typically appear ...
In a typical infectious disease, the incubation period signifies the period taken by the multiplying organism to reach a threshold necessary to produce symptoms in the host. While latent or latency period may be synonymous, a distinction is sometimes made whereby the latent period is defined as the time from infection to infectiousness.
Other symptoms are less common among people with COVID-19. Some people experience gastrointestinal symptoms such as loss of appetite, diarrhea, nausea or vomiting. [1] [65] A June 2020 systematic review reported a 8–12% prevalence of diarrhea, and 3–10% for nausea. [2] Less common symptoms include chills, coughing out blood, diarrhea, and rash.
Here's how long it typically takes for symptoms to start.
Common source outbreak of Hepatitis A in Nov-Dec 1978. This epidemic curve shows a presumed first case, known as the index case on November 6, 1978. 4 days later, there was a steep increase in cases, followed by the curve tapering down to zero.
The CDC would later have to conclude after months of further experience involving more than 700,000 screenings that temperature and symptom-based entry screening was ineffective likely due to multiple factors including an overall low COVID-19 prevalence in travelers, the relatively long incubation period, illness presentation with a wide range ...
For the original strain of COVID-19, a 2020 review of the published literature shows its serial interval to be 4-8 days. [ 4 ] Related but distinct quantities include the 'average transmission interval' sum of average latent and infectious period, the ' incubation period ' between infection and disease onset, and the 'latent period' between ...
This includes people 65 and older or anyone over age 12 with a condition that is a risk factor for severe COVID, including diabetes, asthma, heart disease, obesity, or pregnancy.
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