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Such infection is called subclinical infection. Incubation period (also known as the latent period or latency period) is the time elapsed between exposure to a pathogenic organism, a chemical, or radiation, and when symptoms and signs are first apparent. [1]
Both SARS and Middle East respiratory syndrome (MERS) have incubation periods ranging from 2 to 14 days, with an average of 5 days for SARS and 5 to 7 days for MERS.
The relationship between the latent period, the infectious period (the period of communicability) and the incubation period. In some diseases, as depicted in this diagram, the latent period is shorter than the incubation period. A person can transmit an infection without showing any signs of the disease.
Just over 50% of individuals will experience symptoms within 2 days of infection. Only about 5% of cases will have an incubation period of less than 20 hours, and, at the other extreme, it is expected that 5% of cases would have an incubation period of greater than four and a half days. [20]
The average incubation period of hepatitis E is 40 days, ranging from 2 to 8 weeks. After a short prodromal phase symptoms may include jaundice, fatigue, and nausea, though most HEV infections are asymptomatic. The symptomatic phase coincides with elevated hepatic aminotransferase levels.
The outbreak now seems to have slowed, with Nov 29 marking 28 days without a new case and 22 days since the last patient was discharged from hospital, although there is long incubation period ...
The average incubation period for SARS is four to six days, ... [68] The virus was also later found in raccoon dogs (Nyctereuteus sp.), ferret badgers ...
Justman says norovirus is currently on the rise, with 211 outbreaks reported between August and early November — “surpassing the same period in prior years.” The winter forecast